# Wowza Manager error

**URL:** <https://community.wowza.com/t/wowza-manager-error/45242>\
**Category:** Wowza Streaming Engine\
**Created:** [May 6, 2015, 10:30am UTC](https://community.wowza.com/t/wowza-manager-error/45242 "2015-05-06T10:30:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Alaa\_Alnobani](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Alaa\_Alnobani](https://community.wowza.com/u/Alaa_Alnobani)\
**Post date:** [May 6, 2015, 10:30am UTC](https://community.wowza.com/t/wowza-manager-error/45242/1 "2015-05-06T10:30:25Z")

</div>

Hi,

I have an problem acessing the manager interface , the manger started with no errors in log but when I access [http://localhost:8088/enginemanager/](http://localhost:8088/enginemanager/) I get eh below exception :

ava.lang.SecurityException: class “org.apache.jasper.runtime.AnnotationHelper”'s signer information does not match signer information of other classes in the same package

at java.lang.ClassLoader.checkCerts(Unknown Source)

at java.lang.ClassLoader.preDefineClass(Unknown Source)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$100(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at net.winstone.loader.FilteringClassLoader.loadClass(FilteringClassLoader.java:93)

at java.lang.ClassLoader.loadClass(Unknown Source)

.

.

.

.

Any Idea what could be the problem?

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<div class="post-metadata">

**Author:** ![Michelle\_B](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/michelle_b/32/394_2.png) [@Michelle\_B](https://community.wowza.com/u/Michelle_B)\
**Post date:** [May 6, 2015, 11:06am UTC](https://community.wowza.com/t/wowza-manager-error/45242/2 "2015-05-06T11:06:36Z")

</div>

Hi alaa,

Have you changed your [install-dir]/conf/Server.xml configuration by any chance? If so, please post your Server.xml file (removing/obfuscating any personal information).

Michelle

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<div class="post-metadata">

**Author:** ![Alaa\_Alnobani](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Alaa\_Alnobani](https://community.wowza.com/u/Alaa_Alnobani)\
**Post date:** [May 7, 2015, 12:13am UTC](https://community.wowza.com/t/wowza-manager-error/45242/3 "2015-05-07T00:13:59Z")

</div>

Server.xml is the default one , no changes , here it is:

\<?xml version="1.0" encoding="UTF-8"?\>

Wowza Streaming Engine

Wowza Streaming Engine is robust, customizable, and scalable server software that powers reliable streaming of high-quality video and audio to any device, anywhere.

true

\*

8087

digest

true

false

JKS

TLS

SunX509

127.0.0.1

false

false

8089

digest

${com.wowza.wms.TuningAuto}

\*

8083

Server,VHost,VHostItem,Application,ApplicationInstance,MediaCaster,Module,IdleWorker

true

false

localhost

localhost

8084

8085

true

${com.wowza.wms.ConfigHome}/conf/jmxremote.password

${com.wowza.wms.ConfigHome}/conf/jmxremote.access

false

Shockwave Flash|CFNetwork|MacNetwork/1.0 (Macintosh)

mp4

com.wowza.wms.mediacache.impl.MediaCacheServerListener

${com.wowza.wms.TuningAuto}

${com.wowza.wms.TuningAuto}

6970

false