[jboss-jira] [JBoss JIRA] (WFLY-10181) Deadlock for threads executing org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual

[Flavia Rainone (JIRA)]

Flavia Rainone created WFLY-10181:
-------------------------------------

             Summary: Deadlock for threads executing org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual
                 Key: WFLY-10181
                 URL: https://issues.jboss.org/browse/WFLY-10181
             Project: WildFly
          Issue Type: Bug
          Components: JCA
    Affects Versions: 12.0.0.Final
            Reporter: Flavia Rainone
            Assignee: Flavia Rainone
             Fix For: 13.0.0.Beta1




Two or more threads hold one lock on an instance of java.util.Collections$SynchronizedMap and attempt to obtain a lock on a different instance (e.g. locks on 0x00000001d0d08bd8 and 0x00000001cea22628 in the example below)

"thread-one" ...
java.lang.Thread.State: BLOCKED (on object monitor)
at java.util.Collections$SynchronizedMap.get(Collections.java:2584)

    waiting to lock <0x00000001cea22628> (a java.util.Collections$SynchronizedMap)
    at java.util.AbstractMap.equals(AbstractMap.java:495)
    at java.util.Collections$SynchronizedMap.equals(Collections.java:2631)
    locked <0x00000001d0d08bd8> (a java.util.Collections$SynchronizedMap)
    at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual(XAManagedConnectionFactory.java:563)
    locked <0x00000001d0d08bd8> (a java.util.Collections$SynchronizedMap)
    at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.equals(XAManagedConnectionFactory.java:598)
    at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory$SubjectActions.doCheck(BaseWrapperManagedConnectionFactory.java:1397)
    at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory$SubjectActions.addMatchingProperties(BaseWrapperManagedConnectionFactory.java:1508)
    at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.getConnectionProperties(BaseWrapperManagedConnectionFactory.java:1135)
    at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.matchManagedConnections(XAManagedConnectionFactory.java:533)
    ...
    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:138)
    at org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:66)
    ...

"thread-two" ...
java.lang.Thread.State: BLOCKED (on object monitor)
at java.util.Collections$SynchronizedMap.size(Collections.java:2572)

    waiting to lock <0x00000001d0d08bd8> (a java.util.Collections$SynchronizedMap)
    at java.util.AbstractMap.equals(AbstractMap.java:482)
    at java.util.Collections$SynchronizedMap.equals(Collections.java:2631)
    locked <0x00000001cea22628> (a java.util.Collections$SynchronizedMap)
    at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual(XAManagedConnectionFactory.java:563)
    locked <0x00000001cea22628> (a java.util.Collections$SynchronizedMap)
    at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.equals(XAManagedConnectionFactory.java:598)
    ... [same stack as thread-one above] ...
    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:138)
    at org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:66)
    ...





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