Marcell Hegedus created IVY-1362:
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Summary: Memory leak and infinite loop in ModuleId.java
Key: IVY-1362
URL: https://issues.apache.org/jira/browse/IVY-1362
Project: Ivy
Issue Type: Bug
Components: Core
Affects Versions: 2.2.0
Environment: Eclipse / IvyDE
Reporter: Marcell Hegedus
ModuleId tries save memory by interning objects. This ModuleId cache is not
synchronized and when it is mutated from concurrent threads it is possible that
the WeakHashMap will contain a loop. As described in the blog post: ["A
Beautiful Race
Condition"|http://mailinator.blogspot.hu/2009/06/beautiful-race-condition.html]
The same issue and a memory leak was fixed in IVY-791.
{code:title=Stacktrace of a hanging thread}
java.lang.Thread.State: RUNNABLE
at java.util.WeakHashMap.get(Unknown Source)
at org.apache.ivy.core.module.id.ModuleId.intern(ModuleId.java:63)
at org.apache.ivy.core.module.id.ModuleId.newInstance(ModuleId.java:48)
at
org.apache.ivy.core.module.id.ModuleRevisionId.newInstance(ModuleRevisionId.java:100)
at
org.apache.ivy.plugins.parser.m2.PomModuleDescriptorBuilder.addDependency(PomModuleDescriptorBuilder.java:285)
at
org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParser.parseDescriptor(PomModuleDescriptorParser.java:262)
at
org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParser.parseDescriptor(PomModuleDescriptorParser.java:108)
at
org.apache.ivy.core.cache.DefaultRepositoryCacheManager$MyModuleDescriptorProvider.provideModule(DefaultRepositoryCacheManager.java:659)
at
org.apache.ivy.core.cache.ModuleDescriptorMemoryCache.getStale(ModuleDescriptorMemoryCache.java:68)
at
org.apache.ivy.core.cache.DefaultRepositoryCacheManager.getStaledMd(DefaultRepositoryCacheManager.java:676)
at
org.apache.ivy.core.cache.DefaultRepositoryCacheManager.cacheModuleDescriptor(DefaultRepositoryCacheManager.java:993)
at
org.apache.ivy.plugins.resolver.BasicResolver.parse(BasicResolver.java:546)
at
org.apache.ivy.plugins.resolver.BasicResolver.getDependency(BasicResolver.java:266)
at
org.apache.ivy.plugins.resolver.IBiblioResolver.getDependency(IBiblioResolver.java:503)
at
org.apache.ivy.plugins.resolver.ChainResolver.getDependency(ChainResolver.java:104)
at
org.apache.ivy.plugins.resolver.ChainResolver.getDependency(ChainResolver.java:104)
at
org.apache.ivy.plugins.resolver.ChainResolver.getDependency(ChainResolver.java:104)
at org.apache.ivy.core.resolve.IvyNode.loadData(IvyNode.java:169)
at org.apache.ivy.core.resolve.VisitNode.loadData(VisitNode.java:287)
at
org.apache.ivy.core.resolve.ResolveEngine.fetchDependencies(ResolveEngine.java:696)
at
org.apache.ivy.core.resolve.ResolveEngine.doFetchDependencies(ResolveEngine.java:781)
at
org.apache.ivy.core.resolve.ResolveEngine.fetchDependencies(ResolveEngine.java:704)
at
org.apache.ivy.core.resolve.ResolveEngine.doFetchDependencies(ResolveEngine.java:769)
at
org.apache.ivy.core.resolve.ResolveEngine.fetchDependencies(ResolveEngine.java:704)
at
org.apache.ivy.core.resolve.ResolveEngine.doFetchDependencies(ResolveEngine.java:769)
at
org.apache.ivy.core.resolve.ResolveEngine.fetchDependencies(ResolveEngine.java:704)
at
org.apache.ivy.core.resolve.ResolveEngine.doFetchDependencies(ResolveEngine.java:781)
at
org.apache.ivy.core.resolve.ResolveEngine.fetchDependencies(ResolveEngine.java:704)
at
org.apache.ivy.core.resolve.ResolveEngine.doFetchDependencies(ResolveEngine.java:781)
at
org.apache.ivy.core.resolve.ResolveEngine.fetchDependencies(ResolveEngine.java:704)
at
org.apache.ivy.core.resolve.ResolveEngine.getDependencies(ResolveEngine.java:576)
at
org.apache.ivy.core.resolve.ResolveEngine.resolve(ResolveEngine.java:237)
at org.apache.ivy.Ivy.resolve(Ivy.java:512)
at
org.apache.ivyde.eclipse.cpcontainer.IvyResolveJobThread.resolve(IvyResolveJobThread.java:224)
at
org.apache.ivyde.eclipse.cpcontainer.IvyResolveJobThread.run(IvyResolveJobThread.java:127)
{code}
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