# Java crashes **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [May 16, 2011, 12:51pm UTC](https://community.wowza.com/t/java-crashes/34207 "2011-05-16T12:51:38Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![M\_de\_G](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@M\_de\_G](https://community.wowza.com/u/M_de_G)\ **Post date:** [May 16, 2011, 12:51pm UTC](https://community.wowza.com/t/java-crashes/34207/1 "2011-05-16T12:51:38Z")
Hi! Currently we have a little bit of issues with wowza and java. Last weekend java crashed a couple of times, and i`m not sure what the cause exactly is. I hope you can help me out. Problem: Wowza stopped working. Dmesg shows: ```auto May 13 20:51:17 hostname kernel: [11700997.102428] java invoked oom-killer: gfp_mask=0x1201d2, order=0, oomkilladj=0 May 13 20:51:17 hostname kernel: [11700997.102436] Pid: 8744, comm: java Not tainted 2.6.26-2-amd64 #1 May 13 20:51:17 hostname kernel: [11700997.102437] May 13 20:51:17 hostname kernel: [11700997.102438] Call Trace: May 13 20:51:17 hostname kernel: [11700997.102531] [] oom_kill_process+0x57/0x1dc May 13 20:51:17 hostname kernel: [11700997.102539] [] __capable+0x9/0x1c May 13 20:51:17 hostname kernel: [11700997.103887] [] badness+0x188/0x1c7 May 13 20:51:17 hostname kernel: [11700997.103887] [] out_of_memory+0x1f5/0x28e May 13 20:51:17 hostname kernel: [11700997.103887] [] __alloc_pages_internal+0x31d/0x3bf May 13 20:51:17 hostname kernel: [11700997.103887] [] __do_page_cache_readahead+0x79/0x183 May 13 20:51:17 hostname kernel: [11700997.103887] [] filemap_fault+0x15d/0x33c May 13 20:51:17 hostname kernel: [11700997.103887] [] __do_fault+0x50/0x3e8 May 13 20:51:17 hostname kernel: [11700997.103887] [] futex_wake+0x74/0xfa May 13 20:51:17 hostname kernel: [11700997.103887] [] handle_mm_fault+0x452/0x8de May 13 20:51:17 hostname kernel: [11700997.103887] [] hrtimer_start+0x112/0x134 May 13 20:51:17 hostname kernel: [11700997.103887] [] hrtick_start_fair+0xfb/0x144 May 13 20:51:17 hostname kernel: [11700997.103887] [] do_page_fault+0x5d8/0x9c8 May 13 20:51:17 hostname kernel: [11700997.103887] [] thread_return+0x6b/0xac May 13 20:51:17 hostname kernel: [11700997.103887] [] error_exit+0x0/0x60 May 13 20:51:17 hostname kernel: [11700997.103887] May 13 20:51:17 hostname kernel: [11700997.103887] Mem-info: May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 DMA per-cpu: May 13 20:51:17 hostname kernel: [11700997.103887] CPU 0: hi: 0, btch: 1 usd: 0 May 13 20:51:17 hostname kernel: [11700997.103887] CPU 1: hi: 0, btch: 1 usd: 0 May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 DMA32 per-cpu: May 13 20:51:17 hostname kernel: [11700997.103887] CPU 0: hi: 186, btch: 31 usd: 180 May 13 20:51:17 hostname kernel: [11700997.103887] CPU 1: hi: 186, btch: 31 usd: 178 May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 Normal per-cpu: May 13 20:51:17 hostname kernel: [11700997.103887] CPU 0: hi: 186, btch: 31 usd: 176 May 13 20:51:17 hostname kernel: [11700997.103887] CPU 1: hi: 186, btch: 31 usd: 182 May 13 20:51:17 hostname kernel: [11700997.103887] Active:966157 inactive:26396 dirty:0 writeback:0 unstable:0 May 13 20:51:17 hostname kernel: [11700997.103887] free:5919 slab:4164 mapped:2 pagetables:10479 bounce:0 May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 DMA free:11704kB min:20kB low:24kB high:28kB active:0kB inactive:0kB present:10780kB pages_scanned:0 all_unreclaimable? yes May 13 20:51:17 hostname kernel: [11700997.103887] lowmem_reserve[]: 0 3000 4010 4010 May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 DMA32 free:10008kB min:6056kB low:7568kB high:9084kB active:2928072kB inactive:41940kB present:3072160kB pages_scanned:4700797 all_unreclaimable? yes May 13 20:51:17 hostname kernel: [11700997.103887] lowmem_reserve[]: 0 0 1010 1010 May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 Normal free:1964kB min:2036kB low:2544kB high:3052kB active:936556kB inactive:63516kB present:1034240kB pages_scanned:3837210 all_unreclaimable? yes May 13 20:51:17 hostname kernel: [11700997.103887] lowmem_reserve[]: 0 0 0 0 May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 DMA: 6*4kB 6*8kB 3*16kB 6*32kB 4*64kB 1*128kB 1*256kB 1*512kB 2*1024kB 0*2048kB 2*4096kB = 11704kB May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 DMA32: 1028*4kB 11*8kB 7*16kB 2*32kB 0*64kB 0*128kB 0*256kB 1*512kB 1*1024kB 0*2048kB 1*4096kB = 10008kB May 13 20:51:17 hostname kernel: [11700997.103887] Node 0 Normal: 41*4kB 7*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 1964kB May 13 20:51:17 hostname kernel: [11700997.103887] 67 total pagecache pages May 13 20:51:17 hostname kernel: [11700997.103887] Swap cache: add 19471782, delete 19471782, find 6322006/8213143 May 13 20:51:17 hostname kernel: [11700997.103887] Free swap = 0kB May 13 20:51:17 hostname kernel: [11700997.103887] Total swap = 979956kB May 13 20:51:17 hostname kernel: [11700997.114997] 1048576 pages of RAM May 13 20:51:17 hostname kernel: [11700997.114999] 32134 reserved pages May 13 20:51:17 hostname kernel: [11700997.115000] 3437 pages shared May 13 20:51:17 hostname kernel: [11700997.115001] 0 pages swap cached May 13 20:51:17 hostname kernel: [11700997.115003] Out of memory: kill process 8738 (WowzaMediaServe) score 3365667 or a child May 13 20:51:17 hostname kernel: [11700997.115130] Killed process 8739 (java) ``` Logs: Wowza error log: none Wowza access log, just before the crash (and a piece of logging that it’s beeing started again) ```auto 2011-05-15 19:30:17 CEST play stream INFO 200 first - _defaultVHost_ 10042 _definst_ 0.644 [any] 1935 rtmp://hostname:1935/10042 clientip93.42.217 rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.9216546089064822 WIN 10,0,42,34 1180811637 3572 3453 1 0 0 0 first - - - - - rtmp://hostname:1935/10042/first rtmp://hostname:1935/10042/first - rtmp://hostname:1935/10042 - 2011-05-15 19:31:05 CEST comment server INFO 200 - MediaStreamMediaCasterPlay: close - - - 5261.97 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:31:05 CEST stop stream INFO 200 first - _defaultVHost_ 11231 _definst_ 284.924 [any] 1935 rtmp://hostname:1935/11231 clientip rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 886600220 3688 19661789 1 287463 0 19564992 first - - - -- rtmp://hostname:1935/11231/first rtmp://hostname:1935/11231/first - rtmp://hostname:1935/11231 - 2011-05-15 19:31:08 CEST destroy stream INFO 200 first - _defaultVHost_ 11231 _definst_ 287.439 [any] 1935 rtmp://hostname:1935/11231 clientip rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 886600220 3688 19661973 1 - 0 19564992 first - - - -- rtmp://hostname:1935/11231/first rtmp://hostname:1935/11231/first - rtmp://hostname:1935/11231 - 2011-05-15 19:31:08 CEST disconnect session INFO 200 886600220 - _defaultVHost_ 11231 _definst_ 287.59 [any] 1935 rtmp://hostname:1935/11231clientip rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 886600220 3688 19661973 - - - - - - - -- - - - - rtmp://hostname:1935/11231 - 2011-05-15 19:31:08 CEST comment server INFO 200 - onDisconnect: CLIENT ID=886600220 USER-AGENT=WIN 10,2,153,1 _defaultVHost_ 11231 _definst_ 5264.489 - -- - - - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:31:08 CEST connect-pending session INFO 100 clientip - _defaultVHost_ 11231 _definst_ 0.084 [any] 1935 rtmp://hostname:1935/11231clientip rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 501117344 3443 3073 - - - - - - - - -- - - - rtmp://hostname:1935/11231 - 2011-05-15 19:31:08 CEST comment server INFO 200 - onConnect: CLIENT ID=501117344 USER-AGENT=WIN 10,2,153,1 _defaultVHost_ 11231 _definst_ 5264.563 - -- - - - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:31:08 CEST comment server INFO 200 - sessionParms= _defaultVHost_ 11231 _definst_ 5264.564 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:31:09 CEST connect-pending session INFO 100 clientip - _defaultVHost_ 11231 _definst_ 0.791 [any] 1935 rtmpt://hostname:1935/11231clientip rtmpt (HTTP-1.1) http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 2147123495 3441 3085 - - - - - - -- - - - - - rtmpt://hostname:1935/11231 - 2011-05-15 19:31:09 CEST comment server INFO 200 - onConnect: CLIENT ID=2147123495 USER-AGENT=WIN 10,2,153,1 _defaultVHost_ 11231 _definst_ 5265.293 - -- - - - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:31:09 CEST comment server INFO 200 - sessionParms=null _defaultVHost_ 11231 _definst_ 5265.293 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:31:12 CEST comment server INFO 200 - This stream is PUBLIC _defaultVHost_ 11231 _definst_ 5268.808 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:31:12 CEST connect session INFO 200 clientip - _defaultVHost_ 11231 _definst_ 4.311 [any] 1935 rtmpt://hostname:1935/11231 clientip rtmpt (HTTP-1.1) http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 2147123495 3441 3085 - - - - - - -- - - - - - rtmpt://hostname:1935/11231 - 2011-05-15 19:31:12 CEST comment server INFO 200 - Connection ACCEPTED _defaultVHost_ 11231 _definst_ 5268.813 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:31:13 CEST create stream INFO 200 - - _defaultVHost_ 11231 _definst_ 0.0010 [any] 1935 rtmpt://hostname:1935/11231 clientip rtmpt (HTTP-1.1) http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 2147123495 3513 3425 1 0 0 0 - - - -0 0.0 rtmpt://hostname:1935/11231 rtmpt://hostname:1935/11231 - rtmpt://hostname:1935/11231 - 2011-05-15 19:31:13 CEST comment server INFO 200 - This stream is PUBLIC _defaultVHost_ 11231 _definst_ 5269.588 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:31:13 CEST connect session INFO 200 clientip - _defaultVHost_ 11231 _definst_ 5.11 [any] 1935 rtmp://hostname:1935/11231 clientip rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 501117344 3443 3073 - - - - - - - - - -- - - rtmp://hostname:1935/11231 - 2011-05-15 19:31:13 CEST comment server INFO 200 - Connection ACCEPTED _defaultVHost_ 11231 _definst_ 5269.589 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:31:13 CEST disconnect session INFO 200 501117344 - _defaultVHost_ 11231 _definst_ 5.112 [any] 1935 rtmp://hostname:1935/11231clientip rtmp http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 501117344 3443 3411 - - - - - - - - -- - - - rtmp://hostname:1935/11231 - 2011-05-15 19:31:13 CEST comment server INFO 200 - onDisconnect: CLIENT ID=501117344 USER-AGENT=WIN 10,2,153,1 _defaultVHost_ 11231 _definst_ 5269.591 - -- - - - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:31:13 CEST comment server INFO 200 - MediaStreamMediaCasterPlay: startPlay - - - 5269.612 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:31:13 CEST comment server INFO 200 - LivePlayer.play[11231/_definst_/2011-05-15-18-04-11]: Dynamic Stream Markers are on. - - - 5269.612 -- - - - - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:31:13 CEST play stream INFO 200 first - _defaultVHost_ 11231 _definst_ 0.634 [any] 1935 rtmpt://hostname:1935/11231 clientip rtmpt (HTTP-1.1) http://www.host.nl/swf/flowplayer-3.2.5.swf?0.34244836596281014 WIN 10,2,153,1 2147123495 3571 3470 1 0 0 0 first - - -- - rtmpt://hostname:1935/11231/first rtmpt://hostname:1935/11231/first - rtmpt://hostname:1935/11231 - #Version: 1.0 #Start-Date: 2011-05-15 19:36:36 CEST #Software: Wowza Media Server 2.2.3 build26454 #Date: 2011-05-15 #Fields: date time tz x-event x-category x-severity x-status x-ctx x-comment x-vhost x-app x-appinst x-duration s-ip s-port s-uri c-ip c-proto c-referrer c-user-agent c-client-id cs-bytes sc-bytes x-stream-id x-spos cs-stream-bytes sc-stream-bytes x-sname x-sname-query x-file-name x-file-ext x-file-size x-file-length x-suri x-suri-stem x-suri-query cs-uri-stem cs-uri-query 2011-05-15 19:36:37 CEST server-start server INFO 200 Wowza Media Server 2 Subscription 2.2.3 build26454 - - - - 2.123 - - - - -- - - - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Serial number: XXXXX-XXXXX-XXXXX-XXXXX-REMOVED - - - 2.162 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Maximum connections: Unlimited - - - 2.163 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Hardware Available Processors: 2 - - - 2.163 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Hardware Physical Memory: 1921MB/3970MB - - - 2.164 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Hardware Swap Space: 1MB/956MB - - - 2.164 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Max File Descriptor Count: 1024 - - - 2.166 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Open File Descriptor Count: 46 - - - 2.166 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - OS Name: Linux - - - 2.166 - - - - - - - - - - -- - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - OS Version: 2.6.26-2-amd64 - - - 2.167 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - OS Architecture: amd64 - - - 2.167 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Name: Java HotSpot(TM) 64-Bit Server VM - - - 2.167 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Vendor: Sun Microsystems Inc. - - - 2.167 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Version: 1.6.0_22 - - - 2.168 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java VM Version: 17.1-b03 - - - 2.168 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Spec Version: 1.6 - - - 2.168 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Home: /usr/lib/jvm/java-6-sun-1.6.0.22/jre - - - 2.169 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Max Heap Size: 2995MB - - - 2.169 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Architecture: 64 - - - 2.169 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Encoding[file.encoding]: ANSI_X3.4-1968 - - - 2.17 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[0]: -Xmx3000M - - - 2.17 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[1]: -XX:+UseConcMarkSweepGC - - - 2.17 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[2]: -XX:+CMSIncrementalMode - - - 2.171 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[3]: -XX:+UseParNewGC - - - 2.171 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[4]: -Dcom.sun.management.jmxremote=true - - - 2.171 - - - - - -- - - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[5]: -Dcom.wowza.wms.AppHome=/usr/local/WowzaMediaServer - - - 2.171 - - - -- - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[6]: -Dcom.wowza.wms.ConfigURL= - - - 2.172 - - - - - - -- - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java Args[7]: -Dcom.wowza.wms.ConfigHome=/usr/local/WowzaMediaServer - - - 2.172 - - - -- - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java GC[0]: ParNew - - - 2.172 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Java GC[1]: ConcurrentMarkSweep - - - 2.173 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:37 CEST comment server INFO 200 - Server threads[h/t]: 10/10 - - - 2.173 - - - - - - - - -- - - - - - - - - - - - - - - - 2011-05-15 19:36:38 CEST comment server INFO 200 - CMDInterface now listening: [any]:8083 - - - 3.812 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:39 CEST vhost-start vhost INFO 200 _defaultVHost_ - - - - 4.599 - - - - - - - - - -- - - - - - - - - - - - - - - 2011-05-15 19:36:39 CEST comment server INFO 200 - _defaultVHost_ threads[h/t]:120/80 home:/usr/local/WowzaMediaServer - - - 4.738 - - - -- - - - - - - - - - - - - - - - - - - - - 2011-05-15 19:36:39 CEST comment vhost INFO 200 _defaultVHost_ Bind attempt ([any]:1935:4) - - - 4.755 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:39 CEST comment vhost INFO 200 _defaultVHost_ Bind successful ([any]:1935) - - - 4.758 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:39 CEST comment vhost INFO 200 _defaultVHost_ Bind attempt ([any]:8086:1) - - - 4.76 - - - - - - - -- - - - - - - - - - - - - - - - - 2011-05-15 19:36:39 CEST comment vhost INFO 200 _defaultVHost_ Bind successful ([any]:8086) ``` setenv.sh: ```auto #!/bin/sh _EXECJAVA=java JAVA_OPTS="-Xmx3000M" # Uncomment to run server environment (faster), Note: will only work if server VM install, comes with JDL JAVA_OPTS="$JAVA_OPTS -server" # Better garbage collection setting to avoid long pauses #JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:NewSize=1024m" JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+UseParNewGC" # Uncomment to fix multicast crosstalk problem when streams share multicast port #JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true" WMSAPP_HOME=/usr/local/WowzaMediaServer WMSCONFIG_HOME=/usr/local/WowzaMediaServer WMSCONFIG_URL= export WMSAPP_HOME WMSCONFIG_HOME JAVA_OPTS _EXECJAVA ``` System specs: ```auto 4GB RAM dual core Xenon 2.66Ghz Debian 2.6.26-2-amd64 Java Version: 1.6.0_22 ``` Any clue how I can resolve this? We got, in total, about 10 publishing streams and a maximum of 100 viewers. The streams are about 700kbit/s. ---
**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\ **Post date:** [May 16, 2011, 4:03am UTC](https://community.wowza.com/t/java-crashes/34207/2 "2011-05-16T04:03:14Z")
It looks like the server is not properly tuned. First, the file descriptor count is not set properly (ulimit): ```auto Max File Descriptor Count: 1024 ``` Second, I would remove the special GC settings. These are rarely better: ```auto -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+UseParNewGC ``` Third, I would upgrade to 2.2.4. The error is an out of memory. I do not know of any leaks in 2.2.3 or 2.2.4 so I would suspect it could be custom code. Charlie ---
**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\ **Post date:** [May 16, 2011, 4:56am UTC](https://community.wowza.com/t/java-crashes/34207/3 "2011-05-16T04:56:36Z")
It is the ulimit setting mentioned in the tuning guide. Charlie ---
**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\ **Post date:** [May 20, 2011, 7:47am UTC](https://community.wowza.com/t/java-crashes/34207/4 "2011-05-20T07:47:37Z")
This is most likely a problem with your RTMP output. It is beyond free support for us to help with custom RTMP implementations. Charlie ---
**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\ **Post date:** [May 23, 2011, 3:36am UTC](https://community.wowza.com/t/java-crashes/34207/5 "2011-05-23T03:36:42Z")
Be sure yoiu are running latest Wowza and Java. These problems are usually cause by memory leaks. If you have any custom code, try removing it to see if it helps. Monitor the Java heap size using JCOnsole/JMX. Charlie ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [May 25, 2011, 10:13pm UTC](https://community.wowza.com/t/java-crashes/34207/6 "2011-05-25T22:13:58Z")
Use JConsole to monitor memory usage in Wowza. [https://www.wowza.com/docs/quick-start-guides](https://www.wowza.com/docs/quick-start-guides) Top is not accurate because of the java heap allocation. Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [May 26, 2011, 12:42pm UTC](https://community.wowza.com/t/java-crashes/34207/7 "2011-05-26T12:42:17Z")
I don’t have a guess. JConsole has a nice graph. Richard ---
**Author:** ![M\_de\_G](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@M\_de\_G](https://community.wowza.com/u/M_de_G)\ **Post date:** [May 16, 2011, 1:49pm UTC](https://community.wowza.com/t/java-crashes/34207/8 "2011-05-16T13:49:43Z")
Charlie, What does the file discriptor count do? How to set it right? I couldn’t find the max descriptor count settings in the tuning guide. i`ll remove the GC settings and let wowza restart. Thanks for the help 🙂 ---
**Author:** ![M\_de\_G](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@M\_de\_G](https://community.wowza.com/u/M_de_G)\ **Post date:** [May 20, 2011, 3:24pm UTC](https://community.wowza.com/t/java-crashes/34207/9 "2011-05-20T15:24:15Z")
I have another question, that could be related to this. We are busy with a new encoder, but sometimes strange things are happening, and we are not sure of this is the encoder that can cause these errors, or it’s java with memory issues (or the encoder creates issues so java/wowza crashes). This is the case; it seems that the encoder sometimes just stops with publishing the stream. When taking a look in the error log; ```auto ERROR server comment 2011-05-19 15:55:05 - - - - - 81218.42 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:55:05 - - - - - 81218.42 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.052 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.214 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.214 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.214 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.249 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.315 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.315 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.395 - - - - - - - - AMFDataMixedArray.deserialize[25:24]: java.nio.BufferUnderflowException ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.434 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.5 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.5 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.539 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.54 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.579 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.579 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:56 - - - - - 81389.658 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:57 - - - - - 81389.803 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:57 - - - - - 81390.027 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:57 - - - - - 81390.476 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:57 - - - - - 81390.555 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81390.74 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81391.109 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81391.372 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81391.372 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81391.373 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81391.518 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:58 - - - - - 81391.558 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81391.954 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.02 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.02 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.284 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.323 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.324 - - - - - - - - AMFDataObj.deserialize[25:4]: java.nio.BufferUnderflowException ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.353 - - - - - - - - constructor AMFDataObj(ByteBuffer)[23:25]: java.lang.NegativeArraySizeException ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.469 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:57:59 - - - - - 81392.626 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81392.916 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.141 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.18 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.18 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.22 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.523 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.523 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.562 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:00 - - - - - 81393.563 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:01 - - - - - 81393.787 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:01 - - - - - 81394.037 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:01 - - - - - 81394.644 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:02 - - - - - 81394.749 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:02 - - - - - 81394.868 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:02 - - - - - 81394.868 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:02 - - - - - 81394.868 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:02 - - - - - 81395.356 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:02 - - - - - 81395.646 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:03 - - - - - 81395.804 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:03 - - - - - 81396.253 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:04 - - - - - 81396.806 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:04 - - - - - 81396.885 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:04 - - - - - 81396.885 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:04 - - - - - 81397.175 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:05 - - - - - 81397.782 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:05 - - - - - 81398.296 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:06 - - - - - 81398.863 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:06 - - - - - 81398.902 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:07 - - - - - 81400.063 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 15:58:07 - - - - - 81400.102 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:05 - - - - - 81518.311 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:06 - - - - - 81519.695 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:08 - - - - - 81521.348 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:08 - - - - - 81521.383 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:09 - - - - - 81522.2 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:10 - - - - - 81522.754 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:10 - - - - - 81523.624 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:15 - - - - - 81527.989 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:18 - - - - - 81531.205 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:21 - - - - - 81533.935 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:23 - - - - - 81536.234 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:24 - - - - - 81537.091 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:25 - - - - - 81537.724 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ERROR server comment 2011-05-19 16:00:25 - - - - - 81538.317 - - - - - - - - Zero sized function (client:1664005297:FMLE/3.0 (compatible; Lavf52.84.0)): type:20 size:0: ``` Like I said, i`m not sure if the encoder stops because java/wowza is crashing, or that java/wowza crashes, due to encoder issues. Hope you guys can give me a clue? ---
**Author:** ![M\_de\_G](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@M\_de\_G](https://community.wowza.com/u/M_de_G)\ **Post date:** [May 23, 2011, 8:36am UTC](https://community.wowza.com/t/java-crashes/34207/10 "2011-05-23T08:36:47Z")
Charlie, I still have problems with java that is crashing. Currently, i`m still having issues with java; top (linux), shows: 17428 root 20 0 3625m 2.3g 4280 S 100 58.9 296:43.63 java So I got a 100% CPU load and a memory use of 2.3GB of the total reserved 3500MB. So I think I got two issues; A) CPU hangs @ 100% B) Java does not return it’s used memory (I got 0 connections atm). Any clue? ---
**Author:** ![M\_de\_G](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@M\_de\_G](https://community.wowza.com/u/M_de_G)\ **Post date:** [May 25, 2011, 9:50am UTC](https://community.wowza.com/t/java-crashes/34207/11 "2011-05-25T09:50:12Z")
Charlie, I guess it could be a custom module that we use. We have to figure that out. Another question (and keep out the knowledge that we use a custom module); Currently, we have three publishers, and two viewers. The streams are 700kbit/s. With top, I can see that java is using 1,5GB of the 3500MB. 24024 root 20 0 3523m 1.5g 9720 S 3 38.1 2:25.00 java What would be the expected usage of RAM, when only having three publishers and two viewers (700kbit each), and no use of any custom modules? Can I calculate the expected usage of RAM by java with a certain amount publishers/viewers? ---
**Author:** ![M\_de\_G](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@M\_de\_G](https://community.wowza.com/u/M_de_G)\ **Post date:** [May 26, 2011, 1:31pm UTC](https://community.wowza.com/t/java-crashes/34207/12 "2011-05-26T13:31:42Z")
OK, we will try the JConsole. But still, can you give me an indication of expected memory usage with 3 publishers and 2 viewers @ 700kbit?