On 30/11/2011 21:15, János Löbb wrote: > Hi, > > IT is Mac OSX 10.6.8 > java -version > java version "1.6.0_20" > Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065) > Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode) > tomcat is 7.0.21 > database is Sybase ASE 15.0.3 > > We are getting this error in about every half hour or so: > > java.lang.NullPointerException > Nov 30, 2011 3:21:28 PM org.apache.tomcat.jdbc.pool.ConnectionPool abandon > WARNING: Connection has been abandoned > PooledConnection[net.sourceforge.jtds.jdbc.ConnectionJDBC3@40c65cd4]:java.lang.E\ > xception > at > org.apache.tomcat.jdbc.pool.ConnectionPool.getThreadDump(ConnectionPool.java:973) > at > org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:727) > at > org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:585) > at > org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:174) > at > org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:124) > at > pathology.connection.CopathDbInterface.getConnectionFromPull(CopathDbInterface.java:119) > at > pathology.connection.CopathDbInterface.getConnection(CopathDbInterface.java:85) > at > pathology.connection.CopathDbInterface.getConnection(CopathDbInterface.java:68) > at > pathology.histology.server.DashboardServiceImpl.getBlockDashboardStatsMap(DashboardServiceImpl.java:923) > at > pathology.histology.server.DashboardServiceImpl.getBlockDashboardStats(DashboardServiceImpl.java:513) > at > pathology.histology.server.DashboardServiceImpl.getDashboardStats(DashboardServiceImpl.java:62) > at sun.reflect.GeneratedMethodAccessor597.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569) > at > com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) > at > com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) > at > com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) > at org.apach > > > Any good idea where to start troubleshooting ?
The background pool monitor job is finding connections that either weren't returned to the pool or have died somehow. The time it runs is configurable. Check your code for try-catch-finally bugs where the connection can leak, if an uncaught error escapes. Note: I have rarely had a good experience when dealing with the jTDS drivers. p > Thanks ahead, > > János > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > -- [key:62590808]
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