org.postgresql.util.PSQLException: PANIC: could not write to log file

[mzhang@xxxxxxxx]

In our customer site, the following error
occurred. I tried to find some indication what this means. Is this log
file used for the roll back purpose? In what scenario that one gets such
fatal error?

Please help!!!

Mzhang

Caused by: org.jboss.resource.JBossResourceException: SQLException; - nested throwable: (org.postgresql.util.PSQLException: PANIC: could not write to log file 6, segment 176 at offset 14991360, length 8192: Read-only file system)
   at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.checkException(BaseWrapperManagedConnection.java:636)
   at org.jboss.resource.adapter.jdbc.local.LocalManagedConnection.commit(LocalManagedConnection.java:73)
   at org.jboss.resource.connectionmanager.TxConnectionManager$LocalXAResource.commit(TxConnectionManager.java:905)
   ... 23 more
Caused by: org.postgresql.util.PSQLException: PANIC: could not write to log file 6, segment 176 at offset 14991360, length 8192: Read-only file system
   at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1525)
   at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1309)
   at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
   at org.postgresql.jdbc2.AbstractJdbc2Connection.executeTransactionCommand(AbstractJdbc2Connection.java:617)
   at org.postgresql.jdbc2.AbstractJdbc2Connection.commit(AbstractJdbc2Connection.java:637)
   at org.jboss.resource.adapter.jdbc.local.LocalManagedConnection.commit(LocalManagedConnection.java:69)
   ... 24 more