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This queue is for tickets about the DBD-JDBC CPAN distribution.

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The Basics
Id: 32349
Status: new
Priority: 0/

Owner: Nobody in particular
Requestors: m.d.t.evans [...]

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Severity: (no value)
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Subject: dbd_jdbc server and oracle commits
Date: Wed, 16 Jan 2008 13:41:10 +0000
To: bug-DBD-JDBC [...], gemerson [...]
From: Martin Evans <m.d.t.evans [...]>
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Hi, I'm having some trouble with the dbd_jdbc server not rolling back when talking to oracle. I have some code that goes like this: Connect with autocommit off: $dbo = DBI->connect($jdbc_dsn,$username,$password, { 'AutoCommit' => 0, 'PrintError' => 0 }) or die "Can't connect: $DBI::errstr"; Prepare an insert statement. Start a transaction: $dbo->begin_work(); Execute the insert. At this point, if a perl die or exit is called or a kill signal is sent the transaction is committed to oracle (even though $dbo->commit() has not been called). My suspicion (by playing with oracles sqlplus command) is that oracle always commits the current transaction if the client closes its normally. This is annoying in perl because if you die in the middle of a transaction you normally don't want that data committed. I have a crude hack (below) that helps a little. It rollsback if the client connection vanishes if a SIGTERM is sent (but doesnt if the perl dies or exits)... $ diff -u --- 2006-06-22 17:33:22.000000000 +0100 +++ 2008-01-16 13:21:28.000000000 +0000 @@ -174,8 +174,10 @@ * handleMessage(Connection conn) {conn.handleMessage(this)} */ request = mBerModule.readFrom(mIn); - if (request == null) + if (request == null) { + mConn.rollback(); throw new FatalException("Client disconnected"); + } if (gLog.isDebugEnabled()) gLog.debug("Request: " + request); Regards, Martin. -- -- Dr Martin Evans, Computing Services, Queen Mary

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