XARecoveryModule: Error during recover (This connection has been closed)

When I restart only the PostgreSQL service without restarting Bonita, the following exception is logged into the Cataline log approximately every 2 minutes:
WARN: com.arjuna.ats.jta ARJUNA016027: Local XARecoveryModule.xaRecovery got XA exception XAException.XAER_RMERR
org.postgresql.xa.PGXAException: Error during recover
at org.postgresql.xa.PGXAConnection.recover(PGXAConnection.java:416)
at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.xaRecoveryFirstPass(XARecoveryModule.java:634)
at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.periodicWorkFirstPass(XARecoveryModule.java:226)
at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.periodicWorkFirstPass(XARecoveryModule.java:171)
at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.doWorkInternal(PeriodicRecovery.java:770)
at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.run(PeriodicRecovery.java:382)
Caused by: org.postgresql.util.PSQLException: This connection has been closed.
at org.postgresql.jdbc.PgConnection.checkClosed(PgConnection.java:783)
at org.postgresql.jdbc.PgConnection.createStatement(PgConnection.java:1673)
at org.postgresql.jdbc.PgConnection.createStatement(PgConnection.java:366)
at org.postgresql.xa.PGXAConnection.recover(PGXAConnection.java:393)
... 5 more
There is no information about this error in the other log files. The error disappears only after Bonita is restarted.