[GROOVY-2596] Found a deadlock when I have mutiple threads running a groovy script

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.5.2
• Fix Version/s: 1.5.5
• Flags: Patch
• Assignee: James P. White
• Reporter: Anatol Sialitski
• Created: 11/Feb/08 12:33
• Updated: 05/Apr/15 14:43
• Resolved: 02/Apr/08 11:04

Description

Found one Java-level deadlock:
=============================
"Thread-12":
waiting to lock monitor 0x0810b934 (object 0xaa61ddb8, a org.codehaus.groovy.reflection.CachedClass),
which is held by "Thread-11"
"Thread-11":
waiting to lock monitor 0x0810b974 (object 0x71b8ce88, a java.util.WeakHashMap),
which is held by "Thread-12"

Java stack information for the threads listed above:
===================================================
"Thread-12":
at org.codehaus.groovy.reflection.CachedClass.getCachedSuperClass(CachedClass.java:131)

• waiting to lock <0xaa61ddb8> (a org.codehaus.groovy.reflection.CachedClass)
  at org.codehaus.groovy.reflection.CachedClass.<init>(CachedClass.java:125)
  at org.codehaus.groovy.reflection.ReflectionCache.getCachedClass(ReflectionCache.java:210)
• locked <0x71b8ce88> (a java.util.WeakHashMap)
  at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:106)
  at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:114)
  at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createNormalMetaClass(MetaClassRegistry.java:102)
  at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.create(MetaClassRegistry.java:92)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getGlobalMetaClass(MetaClassRegistryImpl.java:247)
• locked <0x6e29b0c0> (a java.lang.Class)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.access$100(MetaClassRegistryImpl.java:45)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$LocallyKnownClasses.getFromGlobal(MetaClassRegistryImpl.java:112)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$LocallyKnownClasses.getMetaClass(MetaClassRegistryImpl.java:88)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$MyThreadLocal.getMetaClass(MetaClassRegistryImpl.java:356)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:260)
  at org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(InvokerHelper.java:728)
  at groovy.lang.GroovyObjectSupport.<init>(GroovyObjectSupport.java:32)
  at groovy.lang.Script.<init>(Script.java:40)
  at groovy.lang.Script.<init>(Script.java:37)
  at uc5.<init>(uc5.groovy)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
  at java.lang.Class.newInstance0(Class.java:350)
  at java.lang.Class.newInstance(Class.java:303)
  at org.codehaus.groovy.runtime.InvokerHelper.createScript(InvokerHelper.java:416)
  at groovy.lang.GroovyShell.parse(GroovyShell.java:584)
  at groovy.lang.GroovyShell.evaluate(GroovyShell.java:472)
  at groovy.lang.GroovyShell.evaluate(GroovyShell.java:508)
  at org.terracotta.droid.script.GroovyExec.exec(GroovyExec.java:27)
  at org.terracotta.droid.worker.Worker$1.run(Worker.java:53)
  at java.lang.Thread.run(Thread.java:595)
  "Thread-11":
  at org.codehaus.groovy.reflection.ReflectionCache.getCachedClass(ReflectionCache.java:165)
• waiting to lock <0x71b8ce88> (a java.util.WeakHashMap)
  at org.codehaus.groovy.reflection.ParameterTypes.getParametersTypes0(ParameterTypes.java:77)
• locked <0xaa621940> (a org.codehaus.groovy.reflection.CachedMethod)
  at org.codehaus.groovy.reflection.ParameterTypes.getParameterTypes(ParameterTypes.java:63)
  at org.codehaus.groovy.reflection.CachedMethod.compareToCachedMethod(CachedMethod.java:181)
  at org.codehaus.groovy.reflection.CachedMethod.compareTo(CachedMethod.java:163)
  at java.util.Arrays.mergeSort(Arrays.java:1156)
  at java.util.Arrays.mergeSort(Arrays.java:1168)
  at java.util.Arrays.sort(Arrays.java:1080)
  at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:171)
• locked <0xaa61ddb8> (a org.codehaus.groovy.reflection.CachedClass)
  at groovy.lang.MetaClassImpl.populateMethods(MetaClassImpl.java:268)
  at groovy.lang.MetaClassImpl.fillMethodIndex(MetaClassImpl.java:215)
  at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:2469)
• locked <0xaa61d920> (a groovy.lang.MetaClassImpl)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getGlobalMetaClass(MetaClassRegistryImpl.java:248)
• locked <0x6e293f78> (a java.lang.Class)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.access$100(MetaClassRegistryImpl.java:45)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$LocallyKnownClasses.getFromGlobal(MetaClassRegistryImpl.java:112)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$LocallyKnownClasses.getMetaClass(MetaClassRegistryImpl.java:88)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl$MyThreadLocal.getMetaClass(MetaClassRegistryImpl.java:356)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:260)
  at org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(InvokerHelper.java:728)
  at groovy.lang.GroovyObjectSupport.<init>(GroovyObjectSupport.java:32)
  at groovy.lang.Script.<init>(Script.java:40)
  at groovy.lang.Script.<init>(Script.java:37)
  at uc5.<init>(uc5.groovy)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
  at java.lang.Class.newInstance0(Class.java:350)
  at java.lang.Class.newInstance(Class.java:303)
  at org.codehaus.groovy.runtime.InvokerHelper.createScript(InvokerHelper.java:416)
  at groovy.lang.GroovyShell.parse(GroovyShell.java:584)
  at groovy.lang.GroovyShell.evaluate(GroovyShell.java:472)
  at groovy.lang.GroovyShell.evaluate(GroovyShell.java:508)
  at org.terracotta.droid.script.GroovyExec.exec(GroovyExec.java:27)
  at org.terracotta.droid.worker.Worker$1.run(Worker.java:53)
  at java.lang.Thread.run(Thread.java:595)