[jbosscache-issues] [JBoss JIRA] Created: (JBCACHE-1551) Locking parent node

[Nikolay Shestakov (JIRA)]

Locking parent node
-------------------

                 Key: JBCACHE-1551
                 URL: https://jira.jboss.org/jira/browse/JBCACHE-1551
             Project: JBoss Cache
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Locking
    Affects Versions: 3.2.1.GA, 3.2.0.GA
            Reporter: Nikolay Shestakov
            Assignee: Manik Surtani


I have next test:

    @Test
    public void nodes()
    {
        // setup
        Fqn<String> fqn1 = Fqn.fromElements(UUID.randomUUID().toString().replace("-", ""));
        String attribute1 = UUID.randomUUID().toString().replace("-", "");
        String value1 = UUID.randomUUID().toString().replace("-", "");
        Fqn<String> fqn2 = Fqn.fromElements(UUID.randomUUID().toString().replace("-", ""));
        String attribute2 = UUID.randomUUID().toString().replace("-", "");
        String value2 = UUID.randomUUID().toString().replace("-", "");
        Assert.assertFalse(fqn1.equals(fqn2));
        // call
        TransactionHelper.begin();
        _cache.put(fqn1, attribute1, value1);
        TransactionHelper.begin(); // suspend and begin new
        _cache.put(fqn2, attribute2, value2);
        TransactionHelper.commit();
        TransactionHelper.commit();
        // assertions
        Assert.assertEquals(value1, _cache.get(fqn1, attribute1));
        Assert.assertEquals(value2, _cache.get(fqn2, attribute2));
        // clear
    }


sometimes this test is fail (~ one time from 1000 executions): 

Unable to acquire lock on Fqn [/test19cb7eae7cc546b1909261c289] after [10000] milliseconds for requestor [GlobalTransaction:<null>:3]! Lock held by [GlobalTransaction:<null>:2]
at org.jboss.cache.mvcc.MVCCNodeHelper.acquireLock(MVCCNodeHelper.java:159)
	at org.jboss.cache.mvcc.MVCCNodeHelper.wrapNodeForWriting(MVCCNodeHelper.java:236)
	at org.jboss.cache.mvcc.MVCCNodeHelper.wrapNodeForWriting(MVCCNodeHelper.java:186)
	at org.jboss.cache.interceptors.MVCCLockingInterceptor.handlePutKeyValueCommand(MVCCLockingInterceptor.java:101)
	at org.jboss.cache.interceptors.base.PrePostProcessingCommandInterceptor.visitPutKeyValueCommand(PrePostProcessingCommandInterceptor.java:88)
	at org.jboss.cache.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:100)
	at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131)
	at org.jboss.cache.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:65)
	at org.jboss.cache.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:100)
	at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.jboss.cache.interceptors.TxInterceptor.attachGtxAndPassUpChain(TxInterceptor.java:301)
	at org.jboss.cache.interceptors.TxInterceptor.handleDefault(TxInterceptor.java:283)
	at org.jboss.cache.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:65)
	at org.jboss.cache.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:100)
	at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.jboss.cache.interceptors.CacheMgmtInterceptor.visitPutKeyValueCommand(CacheMgmtInterceptor.java:119)
	at org.jboss.cache.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:100)
	at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.jboss.cache.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:178)
	at org.jboss.cache.interceptors.InvocationContextInterceptor.visitPutKeyValueCommand(InvocationContextInterceptor.java:82)
	at org.jboss.cache.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:100)
	at org.jboss.cache.interceptors.InterceptorChain.invoke(InterceptorChain.java:287)
	at org.jboss.cache.invocation.CacheInvocationDelegate.put(CacheInvocationDelegate.java:555)


config file is:

<?xml version="1.0" encoding="UTF-8"?>
<jbosscache
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="urn:jboss:jbosscache-core:config:3.2">

	<transaction
		transactionManagerLookupClass="org.jboss.cache.transaction.GenericTransactionManagerLookup" />

	<locking
		isolationLevel="REPEATABLE_READ"
		lockParentForChildInsertRemove="false"
		nodeLockingScheme="mvcc" />

	<jmxStatistics
		enabled="true" />

</jbosscache>


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