Hi Guys,
My webapp deployed in Glassfish 3.1.2 wqas hung. jstack reported the
following deadlock.
Does this look like a Glassfish deadlock issue or an issue in my
webapp's code?
I can't see anything obvious in my code is causing this deadlock.
Please advice before I file an issue on Glassfish 3.1.2. Thanks.
Found one Java-level deadlock:
=============================
"Lucene Merge Thread #0":
waiting to lock monitor 0x15e9d03c (object 0x3824feb8, a
[Ljava.util.jar.JarFile;),
which is held by "SubscriptionManager.eventsProcessThread"
"SubscriptionManager.eventsProcessThread":
waiting to lock monitor 0x08ff9888 (object 0x3823abd8, a
org.glassfish.web.loader.WebappClassLoader),
which is held by "Lucene Merge Thread #0"
Java stack information for the threads listed above:
===================================================
"Lucene Merge Thread #0":
at
org.glassfish.web.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:2094)
- waiting to lock <0x3824feb8> (a [Ljava.util.jar.JarFile;)
at
org.glassfish.web.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:2066)
at
org.glassfish.web.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1976)
at
org.glassfish.web.loader.WebappClassLoader.findClass(WebappClassLoader.java:901)
at
org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1476)
at
org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1359)
at
org.apache.lucene.index.SegmentReader.termPositions(SegmentReader.java:960)
at
org.apache.lucene.index.SegmentMergeInfo.getPositions(SegmentMergeInfo.java:66)
at
org.apache.lucene.index.SegmentMerger.appendPostings(SegmentMerger.java:569)
at
org.apache.lucene.index.SegmentMerger.mergeTermInfos(SegmentMerger.java:528)
at
org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:463)
at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:111)
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:3938)
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3614)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:388)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:456)
"SubscriptionManager.eventsProcessThread":
at
org.glassfish.web.loader.WebappClassLoader.extractResources(WebappClassLoader.java:2267)
- waiting to lock <0x3823abd8> (a
org.glassfish.web.loader.WebappClassLoader)
at
org.glassfish.web.loader.WebappClassLoader.findResourceInternalFromJars(WebappClassLoader.java:2253)
at
org.glassfish.web.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:2095)
- locked <0x3824feb8> (a [Ljava.util.jar.JarFile;)
at
org.glassfish.web.loader.WebappClassLoader.findResource(WebappClassLoader.java:1036)
at
org.glassfish.web.loader.WebappClassLoader.findResource(WebappClassLoader.java:1020)
at
org.glassfish.web.loader.WebappClassLoader.getResourceAsStream(WebappClassLoader.java:1254)
at
com.sun.syndication.io.impl.PropertiesLoader.<init>(PropertiesLoader.java:72)
at
com.sun.syndication.io.impl.PropertiesLoader.getPropertiesLoader(PropertiesLoader.java:46)
- locked <0x79d73478> (a java.lang.Class for
com.sun.syndication.io.impl.PropertiesLoader)
at
com.sun.syndication.io.impl.PluginManager.<init>(PluginManager.java:54)
at
com.sun.syndication.io.impl.PluginManager.<init>(PluginManager.java:46)
at
com.sun.syndication.feed.synd.impl.Converters.<init>(Converters.java:40)
at
com.sun.syndication.feed.synd.SyndFeedImpl.<clinit>(SyndFeedImpl.java:59)
at
mypackage.pubsub.publisher.AtomFeedManager.createAllEventsFeedInfo(ProGuard:117)
at
mypackage.pubsub.publisher.AtomFeedManager.createSyndFeedInfo(ProGuard:84)
at
mypackage.pubsub.publisher.AtomFeedManager.getSyndFeedInfo(ProGuard:173)
at
mypackage.pubsub.publisher.AtomFeedManager.publishEvent(ProGuard:200)
at mypackage.server.event.i$3.run(ProGuard:350)
at java.lang.Thread.run(Thread.java:662)
Found 1 deadlock.
--
Regards,
Farrukh Najmi
Web: http://www.wellfleetsoftware.com