Bugs item #816243, was opened at 2003-10-02 00:48
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting:
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Category: None
Group: v3.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Chris Fesler (cfesler)
Assigned to: Nobody/Anonymous (nobody)
Summary: NullPointerException in WrappedConnection.unregisterStmt()
Initial Comment:
JBoss 3.2.2RC4
IBM JDK 1.4
Linux (SuSE 8.2)
java.lang.NullPointerException
at
org.jboss.resource.adapter.jdbc.WrappedConnection.unregisterStatement(WrappedConnection.java:809)
at
org.jboss.resource.adapter.jdbc.WrappedStatement.close(WrappedStatement.java:49)
Inspection of WrappedConnection.jpp suggesed that this
may be related to the fact that the connection.close()
is being called (in our application code, not in jboss)
before statement.close():
WrappedConnection.jpp
public void close() throws SQLException
{
closed = true;
...
mc = null;
}
...
void unregisterStatement(WrappedStatement ws)
{
if (mc.getTrackStatements() == false)
...
The NullPointerException occurs on the last quoted line
(i.e., "if (mc.getTrackStatements() ..."), which is
what leads me to the suspicion that I stated above,
regarding the order in which close() is called in our
application. For reference, here's the relevant snippet
of our code (pseudocode, with null checks, etc. removed):
connection.close()
resultSet.close()
preparedStatement.close()
I switched the order of the statements in our
application to:
resultSet.close()
preparedStatement.close()
connection.close()
And the problem went away. Nevertheless, this is a bug
in jboss that ought to be fixed (the jdbc spec
specifically permits calling close() on closed
statements--and even if it didn't, a
NullPointerException would be the wrong result).
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