Takahiro, Any comment on this? -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese: http://www.sraoss.co.jp
> Greetings all, I'm new to the list. > > I've been experimenting with pgpool since the 3.0.1 release. > We have never implemented this in production -- largely because of the > errors we've found during testing. > > > We have intermittent failures with pgpool-II when using the JDBC > driver. > > I'm currently using: > A brand-new build of pgpool-II version 3.1. > postgresql 9.0-801-jdbc4 version of the JDBC drivers. > > My testing server backends are: > Postgres 9.0.4, UTF8, on 32bit Ubuntu 10.04. > They are configured for streaming replication (which is working very > well). > > My java application is making use of the standard JDBC non-pooling > data source (with autoCommit = true) to create connections on multiple > threads. > > Our production configuration currently looks like this: > Application -> C3P0 (Connection Pool) -> JDBC Driver -> master > database > > I have tested the following configurations in my test environment: > Application -> C3P0 -> JDBC Driver -> pgpool-II -> database(s) > Application -> JDBC Driver -> pgpool-II -> database(s) > > In both setups, I continue to have issues with prepared statements and > 'portals' (I think) which the JDBC driver reports as non-existent. > > I have set prepareThreshold=0 on the JDBC driver, to disable statement > caching, and still get these errors. > > Occasionally, during testing, we see messages that look like this: > > Caused by: org.postgresql.util.PSQLException: ERROR: prepared > statement "S_18" does not exist > > at > > org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2102) > > at > > org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1835) > > at > > org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257) > > at > > org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:500) > > at > > org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:388) > > at > > org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:273) > > This causes our application to (obviously) have issues. > > Is there a known good configuration for the JDBC driver & data sources > that should make this work reliably? > > Attached is my pgpool configuration. > > Thank you for any help / suggestions! > > Regards, > -Bryan _______________________________________________ Pgpool-general mailing list [email protected] http://pgfoundry.org/mailman/listinfo/pgpool-general
