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https://issues.apache.org/jira/browse/AXIS2-2931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12677308#action_12677308
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Andreas Veithen commented on AXIS2-2931:
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Reading the entire response into memory is a performance issue for two reasons:
* Axis2 would no longer be able to start processing the response before the
entire message has been received.
* The raw content of the entire message would have to be kept in memory. The
argument that "an xml parser will have to do it at some point anyway" is not
valid. Even if the full Axiom tree of the message is built (which is not
necessarily the case), there is no justification for having two copies of the
message in memory (one in the form of a byte array, the other in the form of an
Axiom tree).
> CLONE -Web Service request loop causes many TIME_WAIT Connections &
> "BindException: Address already in use: connect"
> --------------------------------------------------------------------------------------------------------------------
>
> Key: AXIS2-2931
> URL: https://issues.apache.org/jira/browse/AXIS2-2931
> Project: Axis 2.0 (Axis2)
> Issue Type: Bug
> Affects Versions: 1.1.1, nightly
> Environment: Windows XP, Tomcat, Axis2 nightly build (also
> encountered in 1.1.1), JiBX 1.1.3, Microsoft Windows XP [Version 5.1.2600],
> 126 GB free disk space, 1GB RAM.
> Reporter: Gerry Holly
> Priority: Critical
> Attachments:
> 0001-AXIS2-2931-AXIS2-3478-Release-the-HTTP-connection.patch
>
>
> I am performing the following:
> - Executing a tight loop calling a singel web service
> - Using the same Stub over and over
> - Creating the Stub with a custom ConfigurationContext (see below)
> - Sending cleanup() to Stub after each message sent (although problem existed
> even before cleanup() was added)
> After approximately 4000 messages have been sent, an AxisFault is generated
> caused by the following exception (see below for full stack trace):
> java.net.BindException: Address already in use: connect
> It appears that connections from the client to Axis on Tomcat sometimes (but
> not always) remain in the TIME_WAIT state for several minutes. There are
> 1200-1500 TIME_WAIT connections open when the AxisFault is generated.
> If I step through the web service messages in a debugger, the problem does
> not appear to occur, as the system eventually releases the connections after
> a minute or two.
> Also, if I insert a System.gc() in the client code each time it sends a
> message to the web service (the commented out line of code below), the
> AxisFault does not occur. I have executed the loop over 60,000 times with
> the garbage collection included without generating an AxisFault. There were
> only 400-700 connections in the TIME_WAIT state at a given time, but
> performance slowed down to a crawl.
> Here is the code I am using to create the Stub:
> HttpConnectionManagerParams connectionManagerParams = new
> HttpConnectionManagerParams();
> connectionManagerParams.setTcpNoDelay(true);
> connectionManagerParams.setStaleCheckingEnabled(true);
>
> MultiThreadedHttpConnectionManager connectionManager = new
> MultiThreadedHttpConnectionManager();
> connectionManager.setParams(connectionManagerParams);
> HttpClient httpClient = new HttpClient(connectionManager);
>
> ConfigurationContext configurationContext =
> ConfigurationContextFactory.createConfigurationContextFromFileSystem(null,
> null);
> configurationContext.setProperty(HTTPConstants.REUSE_HTTP_CLIENT,
> Boolean.TRUE);
> configurationContext.setProperty(HTTPConstants.CACHED_HTTP_CLIENT,
> httpClient);
>
> stub = new MyServiceStub(configurationContext, target);
>
> boolean success = true;
> while(success) {
> success = stub.performService(records);
> stub.cleanup();
> // System.gc();
> }
> Here is the complete stack trace:
> Exception in thread "main" org.apache.axis2.AxisFault: Address already
> in use: connect
> at org.apache.axis2.AxisFault.makeFault(AxisFault.java:377)
> at
> org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:179)
> at
> org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:73)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:310)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:202)
> at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:446)
> at
> org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:330)
> at
> org.apache.axis2.description.OutInAxisOperationClient.execute(OutInAxisOperation.java:294)
> at
> com.ws.service.MyServiceStub.performService(MyServiceStub.java:300)
> at com.ws.client.MyClient.main(MyClient.java:88)
> Caused by: java.net.BindException: Address already in use: connect
> at java.net.PlainSocketImpl.socketConnect(Native Method)
> at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
> at
> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
> at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
> at java.net.Socket.connect(Socket.java:519)
> at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
> org.apache.commons.httpclient.protocol.ReflectionSocketFactory.createSocket(ReflectionSocketFactory.java:139)
> at
> org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:124)
> at
> org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:706)
> at
> org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:386)
> at
> org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:170)
> at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
> at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
> at
> org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:558)
> at
> org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:176)
> ... 8 more
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