I'm trying to get rid of the following annoying messages in the tomcat
catalina.out log file. I'm running 1.5.1 on Fedora Core 9 with
postgresql-8.3.3-2.fc9.i386, but I've been getting these messages even with
1.4.2. I got rid of them under 1.4 by replacing the apache database
connection pooling library with another one. However since I upgraded to 1.5
I decided not to try and go too deep in customising, and these messages
can't be a good sign. I'm figuring that they must have an impact on database
response and they can occur quite frequently (like per request). Can anyone
say whether there are any postgresql parameters, or apache pooling library
parameters that I could change.
org.postgresql.util.PSQLException: An I/O error occured while sending to the
backend.
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:214)
at
org.postgresql.jdbc2.AbstractJdbc2Connection.executeTransactionCommand(AbstractJdbc2Connection.java:621)
at
org.postgresql.jdbc2.AbstractJdbc2Connection.rollback(AbstractJdbc2Connection.java:658)
at
org.apache.commons.dbcp.DelegatingConnection.rollback(DelegatingConnection.java:328)
at
org.apache.commons.dbcp.DelegatingConnection.rollback(DelegatingConnection.java:328)
at
org.apache.commons.dbcp.PoolingDriver$PoolGuardConnectionWrapper.rollback(PoolingDriver.java:377)
at org.dspace.core.Context.abort(Context.java:356)
at org.dspace.core.Context.finalize(Context.java:499)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
Caused by: java.io.IOException: Stream closed
at sun.nio.cs.StreamEncoder.ensureOpen(StreamEncoder.java:26)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:121)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212)
at org.postgresql.core.PGStream.flush(PGStream.java:531)
at
org.postgresql.core.v3.QueryExecutorImpl.sendSync(QueryExecutorImpl.java:672)
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:187)
... 11 more
java.sql.SQLException: Already closed.
at
org.apache.commons.dbcp.PoolableConnection.close(PoolableConnection.java:84)
at
org.apache.commons.dbcp.PoolingDriver$PoolGuardConnectionWrapper.close(PoolingDriver.java:269)
at
org.dspace.storage.rdbms.DatabaseManager.freeConnection(DatabaseManager.java:566)
at org.dspace.core.Context.abort(Context.java:365)
at org.dspace.core.Context.finalize(Context.java:499)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
dspace: System startup complete.
John
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