fyi: Classloading issues in 1.395 and openJDK

[Rainer Weinhold]

Just wanted to mention that my Jenkins Installation cannot run with an OpenJDK, in case anyone has simmilar errors.

After an update from 1.386 to 1.935 we run into some XML Classloading issues [TRACE1]:

java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
        at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)

After removing findbugs, checkstyle, and the xunit plugins (all bunding an xerecsimpl.jar) the error changes to the following [TRACE2]:

java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)

This was a general problem in all containers : winstone, tomcat6, tomcat7

As allready mentioned, switch the java environment fixed it. Old java OpenJDK :

java version "1.6.0_0"
OpenJDK  Runtime Environment (build 1.6.0_0-b11)
OpenJDK 64-Bit Server VM (build 1.6.0_0-b11, mixed mode)

new Oralce-Java :

java version "1.6.0_22"
Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
Java HotSpot(TM) 64-Bit Server VM (build 17.1-b03, mixed mode)

As you can seen in the complete stacktraces the crash happend in the subversion plugin. We run two subversion serveres, one we poll and one with a post commit hook.
- After some container restarts, the polling seems to fail, while the post commit just worked. Guess it dependes how 'fast' part of the plugin got loaded. But it seemed like the polling was over time allways going to create errors. ( Guess each poll is a new instance of X ? )
- The whole time the 1.386 installation was starting on the same system without any errors ( worked smooth for the last 2 month)
- Not sure if plugins should use their own classloader, if so, the change in the exception surprises me.
- I would guess if the subverison plugin would not have crashed one of the ohter plugins down the line would have.
- But it works now.

Cheers Rainer


TRACE1

SCHWERWIEGEND: Failed to record SCM polling
java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
        at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
        at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
        at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source)
        at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
        at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.readData(HTTPConnection.java:730)
        at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.readData(HTTPConnection.java:704)
        at org.tmatesoft.svn.core.internal.io.dav.http.HTTPRequest.dispatch(HTTPRequest.java:216)
        at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:351)
        at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:275)
        at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:263)
        at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.doPropfind(DAVConnection.java:126)
        at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getProperties(DAVUtil.java:73)
        at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getResourceProperties(DAVUtil.java:79)
        at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getStartingProperties(DAVUtil.java:103)
        at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.findStartingProperties(DAVUtil.java:125)
        at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getBaselineProperties(DAVUtil.java:226)
        at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getBaselineInfo(DAVUtil.java:184)
        at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.getLatestRevision(DAVRepository.java:182)
        at org.tmatesoft.svn.core.wc.SVNBasicClient.getRevisionNumber(SVNBasicClient.java:482)
        at org.tmatesoft.svn.core.wc.SVNBasicClient.getLocations(SVNBasicClient.java:873)
        at org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:534)
        at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:2563)
        at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:2893)
        at hudson.scm.SubversionSCM.parseSvnInfo(SubversionSCM.java:890)
        at hudson.scm.SubversionSCM.access$300(SubversionSCM.java:173)
        at hudson.scm.SubversionSCM$1.call(SubversionSCM.java:1058)
        at hudson.scm.SubversionSCM$1.call(SubversionSCM.java:1031)
        at hudson.remoting.UserRequest.perform(UserRequest.java:114)


TRACE 2

ERROR: Failed to record SCM polling
java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.<init>(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source)
at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.readData(HTTPConnection.java:730)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.readData(HTTPConnection.java:704)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPRequest.dispatch(HTTPRequest.java:216)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:351)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:275)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:263)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.doPropfind(DAVConnection.java:126)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getProperties(DAVUtil.java:73)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getResourceProperties(DAVUtil.java:79)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getStartingProperties(DAVUtil.java:103)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.findStartingProperties(DAVUtil.java:125)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getBaselineProperties(DAVUtil.java:226)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getBaselineInfo(DAVUtil.java:184)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.getLatestRevision(DAVRepository.java:182)
at org.tmatesoft.svn.core.wc.SVNBasicClient.getRevisionNumber(SVNBasicClient.java:482)
at org.tmatesoft.svn.core.wc.SVNBasicClient.getLocations(SVNBasicClient.java:873)
at org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:534)
at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:2563)
at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:2893)
at hudson.scm.SubversionSCM.parseSvnInfo(SubversionSCM.java:890)
at hudson.scm.SubversionSCM.access$300(SubversionSCM.java:173)
at hudson.scm.SubversionSCM$1.call(SubversionSCM.java:1058)
at hudson.scm.SubversionSCM$1.call(SubversionSCM.java:1031)
at hudson.remoting.UserRequest.perform(UserRequest.java:114)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)