I use PostgreSQL 8.3 -
highly recommended by the way -
and I just updated an application to 8.4.
The application is built principally using Spring, Hibernate, and JMS.
Naturally, some level of
cooperation among transactions is required, so I use an XA provider -
Bitronix.
Everything was working swimmingly
with PostgreSQL 8.3, but the application buckled on startup with
errors when I upgrade PostgreSQL to 8.4:
Dec 30, 2009 11:25:50 PM
bitronix.tm.twopc.AbstractPhaseEngine logFailedResources
SEVERE: resource xasql failed on a Bitronix XID [737072696E672D62746D2D-
73656E64657200000125E3A04B9900000038 : 737072696E672D62746D2D73656E6465720-
0000125E3A04BA40000003A]
org.postgresql.xa.PGXAException: Error preparing transaction
at org.postgresql.xa.PGXAConnection.prepare (PGXAConnection.java:254)
at bitronix.tm.twopc.Preparer$PrepareJob.run (Preparer.java:134)
at bitronix.tm.twopc.executor.SyncExecutor.submit (SyncExecutor.java:12)
at bitronix.tm.twopc.AbstractPhaseEngine.runJobsForPosition (AbstractPhaseEngine.java:109)
at bitronix.tm.twopc.AbstractPhaseEngine.executePhase (AbstractPhaseEngine.java:71)
at bitronix.tm.twopc.Preparer.prepare (Preparer.java:68)
at bitronix.tm.BitronixTransaction.commit (BitronixTransaction.java:176)
at bitronix.tm.BitronixTransactionManager.commit (BitronixTransactionManager.java:95)
at org.springframework.transaction.jta.JtaTransactionManager.doCommit (JtaTransactionManager.java:1009)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit (AbstractPlatformTransactionManager.java:754)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit (AbstractPlatformTransactionManager.java:723)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning (TransactionAspectSupport.java:394)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke (TransactionInterceptor.java:117)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed (ReflectiveMethodInvocation.java:172)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke (ExposeInvocationInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed (ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke (JdkDynamicAopProxy.java:202)
...
Caused by: org.postgresql.util.PSQLException: ERROR: prepared
transactions are disabled
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse (QueryExecutorImpl.java:1592)
at org.postgresql.core.v3.QueryExecutorImpl.processResults (QueryExecutorImpl.java:1327)
at org.postgresql.core.v3.QueryExecutorImpl.execute (QueryExecutorImpl.java:192)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute (AbstractJdbc2Statement.java:451
If you're in my situation, the immediate cure is to uncomment and set
the max_prepared_transactions
attribute in data/postgresql.conf. A safe value seems to
be 10, though your mileage may vary.
There must be a reason they've disabled this in 8.4, so further
investigation is required. In the meantime, though, everything seems
performant and works as it did before.
