# Wowza does not use latest Java version

**URL:** <https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452>\
**Category:** Wowza Streaming Engine\
**Created:** [June 24, 2016, 6:57pm UTC](https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452 "2016-06-24T18:57:32Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Helder\_Conde](https://avatars.discourse-cdn.com/v4/letter/h/ba9def/32.png) [@Helder\_Conde](https://community.wowza.com/u/Helder_Conde)\
**Post date:** [June 24, 2016, 6:57pm UTC](https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452/1 "2016-06-24T18:57:32Z")

</div>

Hi,

I’m using Wowza 4.5.0 on an AWS Linux machine. I’ve correctly installed Java 1.8.0\_91 on the machine.

Here is what I see when I type “java -version”

openjdk version “1.8.0\_91”

OpenJDK Runtime Environment (build 1.8.0\_91-b14)

OpenJDK 64-Bit Server VM (build 25.91-b14, mixed mode)

However, Wowza keeps seeing my Java as 1.7.0\_55. I’ve followed the instructions at [Wowza documentation on how to update Java](https://www.wowza.com/docs/how-to-manually-install-and-troubleshoot-java-on-your-wowza-media-server), but still problem persists, even after I reboot the service.

Any ideas on how to solve this?

Thanks in advance!

Helder Conde

---

<div class="post-metadata">

**Author:** ![J\_van\_Marion](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@J\_van\_Marion](https://community.wowza.com/u/J_van_Marion)\
**Post date:** [June 29, 2016, 11:12pm UTC](https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452/2 "2016-06-29T23:12:13Z")

</div>

I’ve tried if i could reproduce it. I cant update somehow. Can you tell the steps you did? Which OS are you running.

Ive tried this on a ubuntu 16.04 64bit server. Wowza version: 4.5.0

```auto
/usr/local/WowzaStreamingEngine/java/bin/java -version
result:
java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

```

Next commands:

```auto
/usr/local/WowzaStreamingEngine/WowzaStreamingEngine/java/bin/java -version
cat /usr/local/WowzaStreamingEngine/bin/setenv.sh  
result:

```

```auto
#!/bin/bash
if [-d /usr/local/WowzaStreamingEngine/java]; then
        WMSJAVA_HOME=/usr/local/WowzaStreamingEngine/java
    _EXECJAVA=$WMSJAVA_HOME/bin/java
else
    _EXECJAVA=java
fi
# Setting of JAVA_OPTS has moved to conf/Tune.xml
WMSAPP_HOME=/usr/local/WowzaStreamingEngine
WMSCONFIG_HOME=/usr/local/WowzaStreamingEngine
WMSCONFIG_URL=
export WMSAPP_HOME WMSCONFIG_HOME JAVA_OPTS _EXECJAVA WMSJAVA_HOME

```

```auto
cd /usr/local/WowzaStreamingEngine/bin 
sudo ./startup.sh

```

will result in an error at binding. I cant fix this either:

result:

```auto
root@vps287055:/usr/local/WowzaStreamingEngine/bin# sudo ./startup.sh
Configure logging: file:///usr/local/WowzaStreamingEngine/conf/log4j.properties
INFO server server-start Wowza Streaming Engine 4 Developer Edition (Expires: Dec 03, 2016) 4.5.0 build18676 -
INFO server comment - Server License Key: EDEV4-XXXXX-XXXXX-XXXXX-XXXXX-9D4c7
INFO server comment - Maximum Connections: 10
INFO server comment - Maximum Incoming Streams: 3
INFO server comment - Transcoder Streams Available: 1
INFO server comment - Transcoder Watermark: Yes
INFO server comment - nDVR Available: Yes
INFO server comment - DRM Available: Yes
INFO server comment - HTTP Origin Available: No
INFO server comment - Push Publish Available: Yes
INFO server comment - REST API Available: Yes
INFO server comment - Hardware Available Processors: 1
INFO server comment - Hardware Physical Memory [free/total]: 49MB/1952MB
INFO server comment - Max File Descriptor Count: 64000
INFO server comment - Open File Descriptor Count: 73
INFO server comment - Linux Networking Parameters
INFO server comment - /proc/sys/net/core/rmem_default: 212992
INFO server comment - /proc/sys/net/core/rmem_max: 212992
INFO server comment - /proc/sys/net/core/wmem_default: 212992
INFO server comment - /proc/sys/net/core/wmem_max: 212992
INFO server comment - /proc/sys/net/core/optmem_max: 20480
INFO server comment - /proc/sys/net/ipv4/tcp_rmem: 4096 87380 6291456
INFO server comment - /proc/sys/net/ipv4/tcp_wmem: 4096 16384 4194304
INFO server comment - /proc/sys/net/ipv4/tcp_sack: 1
INFO server comment - /proc/sys/net/ipv4/tcp_window_scaling: 1
INFO server comment - OS Name: Linux
INFO server comment - OS Version: 4.4.0-22-generic
INFO server comment - OS Architecture: amd64
INFO server comment - Java Name: Java HotSpot(TM) 64-Bit Server VM
INFO server comment - Java Vendor: Oracle Corporation
INFO server comment - Java Version: 1.8.0_60
INFO server comment - Java VM Version: 25.60-b23
INFO server comment - Java Spec Version: 1.8
INFO server comment - Java Home: /usr/local/WowzaStreamingEngine-4.4.1/jre1.8.0_60
INFO server comment - Java Max Heap Size: 780MB
INFO server comment - Java Architecture: 64
INFO server comment - Java Locale[user.language]: en
INFO server comment - Java Locale[user.country]: US
INFO server comment - Java Locale[file.encoding]: UTF-8
INFO server comment - Java Timezone[user.timezone]: Europe/Paris
INFO server comment - Java Args[0]: -Xmx780M
INFO server comment - Java Args[1]: -XX:+UseG1GC
INFO server comment - Java Args[2]: -XX:MaxGCPauseMillis=100
INFO server comment - Java Args[3]: -Djava.net.preferIPv4Stack=true
INFO server comment - Java Args[4]: -Dcom.sun.management.jmxremote=true
INFO server comment - Java Args[5]: -Dcom.wowza.wms.runmode=standalone
INFO server comment - Java Args[6]: -Dcom.wowza.wms.native.base=linux
INFO server comment - Java Args[7]: -Dcom.wowza.wms.AppHome=/usr/local/WowzaStreamingEngine
INFO server comment - Java Args[8]: -Dcom.wowza.wms.ConfigURL=
INFO server comment - Java Args[9]: -Dcom.wowza.wms.ConfigHome=/usr/local/WowzaStreamingEngine
INFO server comment - Server runmode: standalone
INFO server comment - Server native.platform: linux
INFO server comment - Server threads[h/t]: 120/80
INFO server comment - RESTServer: Bind attempt ([any]:8087)
WARN server comment - RESTServer: Bind failed, try again ([any]:8087): java.net.BindException: Address already in use|at sun.nio.ch.Net.bind0(Native Method)|at sun.nio.ch.Net.bind(Net.java:433)|at sun.nio.ch.Net.bind(Net.java:425)|at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)|at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)|

```

---

<div class="post-metadata">

**Author:** ![J\_van\_Marion](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@J\_van\_Marion](https://community.wowza.com/u/J_van_Marion)\
**Post date:** [July 6, 2016, 11:15pm UTC](https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452/3 "2016-07-06T23:15:51Z")

</div>

Hi Andrew,

thx. i can confirm this works.

rm -rf /usr/local/WowzaStreamingEngine/java

ln -sf /usr/lib/jvm/java-8-oracle/ /usr/local/WowzaStreamingEngine/java

That worked for me.

Restarted the StreamingEngine and Manager after that and now in the dashboard the java version is updated to 1.8.0\_91

From what i see you already updated the documentation page?

---

<div class="post-metadata">

**Author:** ![Andrew\_Ramberg](https://avatars.discourse-cdn.com/v4/letter/a/7c8e57/32.png) [@Andrew\_Ramberg](https://community.wowza.com/u/Andrew_Ramberg)\
**Post date:** [July 5, 2016, 2:27pm UTC](https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452/4 "2016-07-05T14:27:31Z")

</div>

Hello,

We are currently looking at updating the article that documents the Java upgrade. Please try the following steps instead using your jdk or jre version info:

rm -rf /usr/local/WowzaStreamingEngine/java

ln -sf /usr/lib/jvm/jdk[version]/ /usr/local/WowzaStreamingEngine/java

Best regards,

Andrew

---

<div class="post-metadata">

**Author:** ![Alberto\_Cabaleiro](https://avatars.discourse-cdn.com/v4/letter/a/a9adbd/32.png) [@Alberto\_Cabaleiro](https://community.wowza.com/u/Alberto_Cabaleiro)\
**Post date:** [November 6, 2019, 11:06am UTC](https://community.wowza.com/t/wowza-does-not-use-latest-java-version/34452/5 "2019-11-06T11:06:54Z")

</div>

Hello all,

Thanks for posting in our forum. We do have an article now explaining how to instruct Wowza Streaming Engine to use a specific version of Java: [https://www.wowza.com/docs/manually-install-and-troubleshoot-java-on-wowza-streaming-engine#instruct-wowza-streaming-engine-to-use-a-specific-version-of-java](https://www.wowza.com/docs/manually-install-and-troubleshoot-java-on-wowza-streaming-engine#instruct-wowza-streaming-engine-to-use-a-specific-version-of-java)

Kind regards,

Alberto Cabaleiro

Wowza Support Engineer