Also, you may be interested in the OpenJPAEntityManager.cancelAll() method call, which uses different JDBC pathways to kill running queries.
-Patrick -- Patrick Linskey BEA Systems, Inc. _______________________________________________________________________ Notice: This email message, together with any attachments, may contain information of BEA Systems, Inc., its subsidiaries and affiliated entities, that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it. > -----Original Message----- > From: Marc Prud'hommeaux [mailto:[EMAIL PROTECTED] On > Behalf Of Marc Prud'hommeaux > Sent: Thursday, March 22, 2007 5:09 PM > To: open-jpa-dev@incubator.apache.org > Subject: Re: Cannot get QueryTimeout to work > > > FYI, setQueryTimeout() will meter call > Statement.setQueryTimeout() on > the underlying driver. JDBC drivers frequently either don't > implement > this, or their implementation is very flawed. Unfortunately, we > haven't done detailed analyses of which drivers properly > implement it > or not, so I don't know if DB2 has a proper implementation of it. > > One way to test our whether it is supported is to write a > small stand- > alone test case that directly creates a JDBC Connection and tries to > execute a slow or blocking SQL statement on a Statement after you > call setQueryTimeout() and see if it correctly times out. If it > doesn't, then the problem is with the driver. If it does, then > there's something wrong with OpenJPA and we can investigate further. > > > > > On Mar 22, 2007, at 4:47 PM, Don Brady wrote: > > > Hi, > > > > I hope this is not off-topic on this list, but I cannot seem to > > get QueryTimeout to work, using the persistence.xml below under > > WebSphere 6.1 with a DB2 connection pool defined in WebSphere, > > under OpenJPA 0.9.6. > > > > It seems to just ignore the timeout specified and run to > > completion no longer how long it takes. > > > > I was wondering if the below should work or if there is another > > way of setting a query timeout. I cannot find one. > > > > Actually if I wrap it in a transaction, then I can set a timeout > > on the transaction and that does work. But I was avoiding > using a > > transaction on the basis of advice in the book "Pro EJB" to omit > > transactions if they are not needed, in the case of a read-only > > query, because they may incur a performance penalty. Would > that be > > true in OpenJPA for a large read-only query or should I just use a > > transaction and set the timeout on that? > > > > Thank you for any comments! > > > > Don > > > > > > persistence.xml contents: > > > > <?xml version="1.0" encoding="UTF-8"?> > > <persistence version="1.0" > > xmlns="http://java.sun.com/xml/ns/persistence"; > > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > > > xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http:// > > java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> > > > > <persistence-unit name="mpu-prod" transaction-type="JTA"> > > <provider> > > > org.apache.openjpa.persistence.PersistenceProviderImpl > > </provider> > > <jta-data-source>jdbc/mship-prod</jta-data-source> > > > <non-jta-data-source>jdbc/mship-prod</non-jta-data-source> > > > <mapping-file>META-INF/orm-prod.xml</mapping-file> > > > <exclude-unlisted-classes>false</exclude-unlisted-classes> > > > > <properties> > > <property name="openjpa.jdbc.Schema" > value="PROD" /> > > <property name="openjpa.DataCache" > value="false" /> > > <property > name="openjpa.RemoteCommitProvider" value="sjvm" /> > > <property name="openjpa.Log" > > value="DefaultLevel=WARN, > Runtime=INFO, Tool=INFO, SQL=TRACE" /> > > <property name="openjpa.jdbc.DBDictionary" > > > value="db2(StoreCharsAsNumbers=false)" /> > > <property > name="openjpa.TransactionMode" value="managed" /> > > <property > name="openjpa.jdbc.TransactionIsolation" > > value="read-committed" /> > > <property name="openjpa.ConnectionFactoryMode" > > value="managed" /> > > <property > name="openjpa.ConnectionFactoryProperties" > > value="QueryTimeout=30"/> > > > > > > </properties> > > </persistence-unit> > > > > </persistence> > > Notice: This email message, together with any attachments, may contain information of BEA Systems, Inc., its subsidiaries and affiliated entities, that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it.
