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https://issues.apache.org/jira/browse/CAMEL-10071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341238#comment-15341238
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Daniel Pocock commented on CAMEL-10071:
---------------------------------------
As it involves logging, it impacts the way it is used in a framework. It also
appeared on the Service Mix mailing list, so I thought it useful to fully
document the issue here. Another developer is looking at it more closely as
Jitsi also uses this JAR.
There may be a workaround involving a system property and that could be coded
into the camel-sip component if the issue isn't resolved with an upstream
change.
> camel-sip - hard dependency on log4j 1.2.x JAR
> ----------------------------------------------
>
> Key: CAMEL-10071
> URL: https://issues.apache.org/jira/browse/CAMEL-10071
> Project: Camel
> Issue Type: Improvement
> Components: camel-sip
> Affects Versions: 2.17.1
> Environment: n/a
> Reporter: Daniel Pocock
> Priority: Minor
>
> Trying to use log4j 2.x and the log4j-1.2-api (to emulate log4j 1.2 support),
> starting a route with camel-sip fails to initialize:
> Failed to create Producer for endpoint: Endpoint[sip://test@...
> stackName=client]. Reason: javax.sip.PeerUnavailableException: The Peer SIP
> Stack: gov.nist.javax.sip.SipStackImpl could not be instantiated. Ensure the
> Path Name has been set.
> Further down the stack trace, it has:
> Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/SimpleLayout
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:190)
> at gov.nist.javax.sip.SipStackImpl.<init>(SipStackImpl.java:666)
> ... 65 more
> Caused by: java.lang.ClassNotFoundException: org.apache.log4j.SimpleLayout
> at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
> ... 68 more
> The original log4j 1.2.x JAR needs to be on the classpath to provide that
> class.
> The problem is at SipStackImpl.java:666 which appears to be in the dependency
> jain-sip-api-1.2.jar
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