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Posted to derby-dev@db.apache.org by Myrna van Lunteren <m....@gmail.com> on 2011/12/29 01:28:44 UTC
Re: Where can I find information on how to turn on tracing
On Wed, Dec 28, 2011 at 4:08 PM, Bergquist, Brett <BB...@canoga.com> wrote:
> I am pursuing a bug where when the Network Client receives a Lock Timeout
> exception in
>
>
>
> PreparedStatement.java:
>
>
>
> public int executeUpdate() throws SQLException {
>
> try
>
> {
>
> synchronized (connection_) {
>
> if (agent_.loggingEnabled()) {
>
> agent_.logWriter_.traceEntry(this, "executeUpdate");
>
> }
>
> int updateValue = executeUpdateX();
>
> if (agent_.loggingEnabled()) {
>
> agent_.logWriter_.traceExit(this, "executeUpdate",
> updateValue);
>
> }
>
> return updateValue;
>
> }
>
> }
>
> catch ( SqlException se ) {
>
> checkStatementValidity(se);
>
> throw se.getSQLException();
>
> }
>
> }
>
>
>
> I see “se” being the correct exception, but it then goes on to call:
>
>
>
> Sqlca.java:
>
>
>
> private String getMessage(int messageNumber) throws SqlException {
>
> // should this be traced to see if we are calling a stored proc?
>
> if (cachedMessages != null && cachedMessages[messageNumber] != null)
> {
>
> return cachedMessages[messageNumber];
>
> }
>
>
>
> if (connection_ == null || connection_.isClosedX() ||
> returnTokensOnlyInMessageText_) {
>
> return getUnformattedMessage(messageNumber);
>
> }
>
>
>
> CallableStatement cs = null;
>
> synchronized (connection_) {
>
> try {
>
> cs = connection_.prepareMessageProc("call
> SYSIBM.SQLCAMESSAGE(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)");
>
>
>
> String errmc = null;
>
> String sqlState = null;
>
>
>
> if (sqlErrmcMessages_ != null) {
>
> errmc = sqlErrmcMessages_[messageNumber];
>
> sqlState = sqlStates_[messageNumber];
>
> }
>
>
>
> This code fails with an error indicating that there is no current
> connection. It is as if something has closed the connection in between. I
> want to enable as much tracing as I can so that maybe I can find this
> thing. I am not sure if it is a problem on the server end of the DRDA
> connection or the client side.
>
>
>
> I see tracing in the code but I don’t know how to turn this one. Just point
> me where to read about it and I will do the rest.
>
>
>
> Thanks.
>
>
>
> Brett
Hi Brett,
I'm not sure which tracing you refer to, but perhaps this page helps:
http://wiki.apache.org/db-derby/DebugPropertiesTmpl
In case you're not aware of this, to get sane (debug) builds, you have
a couple of mechanisms, such as start your build with -Dsane=true, or
set this property in a file you can create called $HOME/ant.properties
or [top_of_your_tree]/local.properties.
HTH,
Myrna