[
https://issues.apache.org/jira/browse/QPID-6735?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Keith Wall closed QPID-6735.
----------------------------
> [Java Broker] Out of memory when consuming messages in very large transaction
> -----------------------------------------------------------------------------
>
> Key: QPID-6735
> URL: https://issues.apache.org/jira/browse/QPID-6735
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Reporter: Rob Godfrey
> Assignee: Keith Wall
> Fix For: qpid-java-6.0
>
>
> The flow to disk mechanism for the Java Broker is not sufficient for dealing
> with the case where large (or large numbers of) flowed to disk messages are
> being sent from the broker to the client in a transaction. When sending the
> message it is retrieved from disk and memory allocated for this... however
> unless the housekeeping thread evicts it again it stays in memory until the
> transaction is committed.
> The following simple test program
> {code:java}
> public class Test
> {
> public static void main(String[] args) throws Exception
> {
> System.setProperty("qpid.amqp.version","0-9-1");
> AMQConnection conn = new AMQConnection("127.0.0.1","admin","admin",
> "foo","test");
> conn.start();
> Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
> Queue queue = session.createQueue("queue");
> final MessageProducer prod = session.createProducer(queue);
> for(int i = 0; i < 20000; i++)
> {
> final BytesMessage bytesMessage = session.createBytesMessage();
> bytesMessage.writeBytes(new byte[1024*1024]);
> prod.send(bytesMessage);
> }
> Session session2 = conn.createSession(true,
> Session.SESSION_TRANSACTED);
> MessageConsumer cons = session2.createConsumer(queue);
> while(cons.receive(1000) != null);
> session2.commit();
> conn.close();
> }
> }
> {code}
> with the following exception
> {noformat}
> ########################################################################
> #
> # Unhandled Exception java.lang.OutOfMemoryError: Direct buffer memory in
> Thread virtualhost-test-iopool-3
> #
> # Exiting
> #
> ########################################################################
> java.lang.OutOfMemoryError: Direct buffer memory
> at java.nio.Bits.reserveMemory(Bits.java:658)
> at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
> at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:306)
> at
> org.apache.qpid.bytebuffer.QpidByteBuffer.allocateDirect(QpidByteBuffer.java:464)
> at
> org.apache.qpid.bytebuffer.QpidByteBuffer.allocateDirectCollection(QpidByteBuffer.java:514)
> at
> org.apache.qpid.server.store.berkeleydb.AbstractBDBMessageStore.getAllContent(AbstractBDBMessageStore.java:413)
> at
> org.apache.qpid.server.store.berkeleydb.AbstractBDBMessageStore$StoredBDBMessage.getContentAsByteBuffer(AbstractBDBMessageStore.java:1100)
> at
> org.apache.qpid.server.store.berkeleydb.AbstractBDBMessageStore$StoredBDBMessage.getContent(AbstractBDBMessageStore.java:1126)
> at
> org.apache.qpid.server.message.AbstractServerMessageImpl.getContent(AbstractServerMessageImpl.java:172)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl$MessageContentSourceBody.writePayload(ProtocolOutputConverterImpl.java:292)
> at org.apache.qpid.framing.AMQFrame.writePayload(AMQFrame.java:81)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl$CompositeAMQBodyBlock.writePayload(ProtocolOutputConverterImpl.java:513)
> at
> org.apache.qpid.server.protocol.v0_8.AMQPConnection_0_8.writeFrame(AMQPConnection_0_8.java:434)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl.writeFrame(ProtocolOutputConverterImpl.java:465)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl.writeMessageDeliveryUnchanged(ProtocolOutputConverterImpl.java:224)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl.writeMessageDelivery(ProtocolOutputConverterImpl.java:148)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl.writeMessageDelivery(ProtocolOutputConverterImpl.java:101)
> at
> org.apache.qpid.server.protocol.v0_8.ProtocolOutputConverterImpl.writeDeliver(ProtocolOutputConverterImpl.java:78)
> at
> org.apache.qpid.server.protocol.v0_8.AMQPConnection_0_8$WriteDeliverMethod.deliverToClient(AMQPConnection_0_8.java:1421)
> at
> org.apache.qpid.server.protocol.v0_8.ConsumerTarget_0_8.sendToClient(ConsumerTarget_0_8.java:489)
> at
> org.apache.qpid.server.protocol.v0_8.ConsumerTarget_0_8$AckConsumer.doSend(ConsumerTarget_0_8.java:293)
> at
> org.apache.qpid.server.consumer.AbstractConsumerTarget.sendNextMessage(AbstractConsumerTarget.java:211)
> at
> org.apache.qpid.server.consumer.AbstractConsumerTarget.processPending(AbstractConsumerTarget.java:63)
> at
> org.apache.qpid.server.protocol.v0_8.AMQChannel.processPending(AMQChannel.java:3757)
> at
> org.apache.qpid.server.protocol.v0_8.AMQPConnection_0_8.processPending(AMQPConnection_0_8.java:1549)
> at
> org.apache.qpid.server.transport.MultiVersionProtocolEngine.processPending(MultiVersionProtocolEngine.java:197)
> at
> org.apache.qpid.server.transport.NonBlockingConnection.doWork(NonBlockingConnection.java:220)
> at
> org.apache.qpid.server.transport.NetworkConnectionScheduler.processConnection(NetworkConnectionScheduler.java:121)
> at
> org.apache.qpid.server.transport.NetworkConnectionScheduler.access$000(NetworkConnectionScheduler.java:37)
> at
> org.apache.qpid.server.transport.NetworkConnectionScheduler$2.run(NetworkConnectionScheduler.java:102)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:724)
> {noformat}
> with the broker VM memory settings as follows
> {noformat}
> -Dvirtualhost.connectionThreadPool.maximum=20
> -Dvirtualhost.connectionThreadPool.minimum=16 -verbose:gc -Xmx2048m -Xms1024m
> -XX:MaxDirectMemorySize=3072m
> {noformat}
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