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  1. WildFly
  2. WFLY-10181

Deadlock for threads executing org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.isEqual (WFLY)

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      Description

      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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                • Assignee:
                  gaol Lin Gao
                  Reporter:
                  flavia.rainone Flavia Rainone
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                  • Created:
                    Updated:
                    Resolved: