[jboss-jira] [JBoss JIRA] (JBJCA-1371) Deadlock for threads executing org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual

[Flavia Rainone (JIRA)]

Flavia Rainone created JBJCA-1371:
-------------------------------------

             Summary: Deadlock for threads executing org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual
                 Key: JBJCA-1371
                 URL: https://issues.jboss.org/browse/JBJCA-1371
             Project: IronJacamar
          Issue Type: Bug
          Components: Core
            Reporter: Flavia Rainone
            Assignee: Flavia Rainone


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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