Re: JDBC driver

I've seen the same behavior using JBoss + tomcat with connection pools. My
postgres db lives on a machine that shuts down over night. JBoss and Tomcat
have to be restarted for the connection pools to function correctly when the
db comes back on-line.
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http://www.visicomp.com

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On Thursday 08 November 2001 07:58 pm, Dave Cramer wrote:
> Jacob,
>
> Is it possible that the database was restarted and tomcat wasn't?
>
> I have seen this happened in my code which uses a connection pool.
> The connection is kept open by the pool, and it thinks the connection is
> open. If the database to which the connection is open is shutdown, or
> restarted then this error can occur. Check using ps auxw | grep post to
> see if the connections are still there.
>
> Dave
>
> -----Original Message-----
> From: pgsql-jdbc-owner(at)postgresql(dot)org
> [mailto:pgsql-jdbc-owner(at)postgresql(dot)org] On Behalf Of Jacob Vennervald
> Madsen
> Sent: November 8, 2001 9:04 AM
> To: pgsql-jdbc(at)postgresql(dot)org
> Subject: [JDBC] JDBC driver
>
>
> Hi List
>
> I'm running Jakarta tomcat 4.0 on a RedHat 7.1 and I'm using a
> Postgresql database.
> The system had been running for two weeks without problems but then i
> got an exception from tomcat.
> This is the exception i got:
>
> 2001-11-08 14:23:04,607 ERROR UserDBHandler - Problem executing query
> 2001-11-08 14:23:04,607 ERROR UserDBHandler - An I/O error has occured
> while flushing the output - Exception: java.io.IOException: Broken pipe
> Stack Trace:
>
> java.io.IOException: Broken pipe
> at java.net.SocketOutputStream.socketWrite(Native Method)
> at java.net.SocketOutputStream.write(SocketOutputStream.java:83)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:72)
> at
> java.io.BufferedOutputStream.flush(BufferedOutputStream.java:130)
> at org.postgresql.PG_Stream.flush(PG_Stream.java:414)
> at org.postgresql.Connection.ExecSQL(Connection.java:464)
> at org.postgresql.jdbc2.Statement.execute(Statement.java:294)
> at
> org.postgresql.jdbc2.Statement.executeQuery(Statement.java:59)
> at
> org.postgresql.jdbc2.PreparedStatement.executeQuery(PreparedStatement.ja
> va:108)
> at
> com.gopinocchio.gosession.UserDBHandler.selectAllUsers(UserDBHandler.jav
> a:709)
> at
> com.gopinocchio.gosession.UserAdminServlet.doGet(UserAdminServlet.java:1
> 02)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown
> Source)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source)
> at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invoke(Unknown
> Source)
> at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
> at org.apache.catalina.core.StandardContextValve.invoke(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invoke(Unknown
> Source)
> at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
> at org.apache.catalina.core.StandardContext.invoke(Unknown
> Source)
> at org.apache.catalina.core.StandardHostValve.invoke(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
> Source)
> at org.apache.catalina.valves.AccessLogValve.invoke(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invoke(Unknown
> Source)
> at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
> at org.apache.catalina.core.StandardEngineValve.invoke(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
> Source)
> at org.apache.catalina.core.StandardPipeline.invoke(Unknown
> Source)
> at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
> at
> org.apache.catalina.connector.http.HttpProcessor.process(Unknown Source)
> at org.apache.catalina.connector.http.HttpProcessor.run(Unknown
> Source)
> at java.lang.Thread.run(Thread.java:484)
> End of Stack Trace
>
> I had to restart tomcat to make it work again.
>
> I could connect to other parts of the database without problems.
> I tried to look in the postgres log but no messages were generated wich
> tells me that the connection was never made.
>
> Any ideas?
>
> Jacob Vennervald Madsen
> Mobile System Developer
>
> GoPinocchio
> Norrebrogade 45
> DK-2200 Copenhagen
> www.gopinocchio.com
> +45 26750106
>
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