我正在使用 wsdl2java 为axis2 Web 服务生成的Web 服务客户端（axis2 版本是1.6.1）。因此，对于 http 连接，使用的是旧版本的 commons-httpclient 3.1。在对我的 Web 服务客户端进行一些负载测试时。在某些情况下，我遇到了这个异常
org.apache.axis2.AxisFault: org.apache.axiom.ext.io.StreamCopyException: Error reading from source
at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
at com.ardic.arcsp.carbon.registry.ws.stub.WSStorageServiceStub.fromOM(WSStorageServiceStub.java:16706)
at com.ardic.arcsp.carbon.registry.ws.stub.WSStorageServiceStub.wSgetById(WSStorageServiceStub.java:6659)
at com.ardic.arcsp.update.wsclient.WSStorageServiceClient.getResourceById(WSStorageServiceClient.java:177)
at com.ardic.arcsp.update.wsclient.OTAUpdateTestServlet.downloadResource(OTAUpdateTestServlet.java:162)
at com.ardic.arcsp.update.wsclient.OTAUpdateTestServlet.doGet(OTAUpdateTestServlet.java:91)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at sun.reflect.GeneratedMethodAccessor30.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:273)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:270)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:305)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:298)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:57)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.wso2.carbon.server.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:154)
at org.wso2.carbon.server.TomcatServer$1.invoke(TomcatServer.java:254)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399)
at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:396)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:356)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1534)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:705)
Caused by: org.apache.axiom.om.OMException: org.apache.axiom.ext.io.StreamCopyException: Error reading from source
at org.apache.axiom.attachments.impl.PartFactory.createPart(PartFactory.java:172)
at org.apache.axiom.attachments.Attachments.getPart(Attachments.java:705)
at org.apache.axiom.attachments.Attachments.getNextPartDataHandler(Attachments.java:623)
at org.apache.axiom.attachments.Attachments.getDataHandler(Attachments.java:350)
at org.apache.axiom.om.impl.builder.OMAttachmentAccessorMimePartProvider.getDataHandler(OMAttachmentAccessorMimePartProvider.java:45)
at org.apache.axiom.util.stax.xop.XOPDecodingStreamReader$DataHandlerProviderImpl.getDataHandler(XOPDecodingStreamReader.java:81)
at org.apache.axiom.util.stax.xop.XOPDecodingStreamReader.getDataHandler(XOPDecodingStreamReader.java:472)
at org.apache.axiom.om.impl.SwitchingWrapper.getDataHandler(SwitchingWrapper.java:1360)
at org.apache.axiom.util.stax.XMLStreamReaderUtils.getDataHandlerFromElement(XMLStreamReaderUtils.java:230)
at com.ardic.arcsp.carbon.registry.ws.stub.xsd.WSResource$Factory.parse(WSResource.java:2087)
at com.ardic.arcsp.carbon.registry.ws.stub.WSgetByIdResponse$Factory.parse(WSgetByIdResponse.java:417)
at com.ardic.arcsp.carbon.registry.ws.stub.WSStorageServiceStub.fromOM(WSStorageServiceStub.java:16273)
... 37 more
Caused by: org.apache.axiom.ext.io.StreamCopyException: Error reading from source
at org.apache.axiom.attachments.utils.BAAOutputStream.readFrom(BAAOutputStream.java:114)
at org.apache.axiom.attachments.impl.BufferUtils.inputStream2OutputStream(BufferUtils.java:76)
at org.apache.axiom.attachments.impl.PartFactory.createPart(PartFactory.java:136)
... 48 more
Caused by: java.io.IOException: CRLF expected at end of chunk: 116/161
at org.apache.commons.httpclient.ChunkedInputStream.readCRLF(ChunkedInputStream.java:207)
at org.apache.commons.httpclient.ChunkedInputStream.nextChunk(ChunkedInputStream.java:219)
at org.apache.commons.httpclient.ChunkedInputStream.read(ChunkedInputStream.java:176)
at java.io.FilterInputStream.read(FilterInputStream.java:116)
at org.apache.commons.httpclient.AutoCloseInputStream.read(AutoCloseInputStream.java:108)
at java.io.FilterInputStream.read(FilterInputStream.java:116)
at org.apache.axiom.om.util.DetachableInputStream.read(DetachableInputStream.java:147)
at java.io.FilterInputStream.read(FilterInputStream.java:116)
at java.io.PushbackInputStream.read(PushbackInputStream.java:169)
at org.apache.axiom.attachments.BoundaryPushbackInputStream.readFromStream(BoundaryPushbackInputStream.java:114)
at org.apache.axiom.attachments.BoundaryPushbackInputStream.read(BoundaryPushbackInputStream.java:248)
at org.apache.axiom.attachments.MIMEBodyPartInputStream.read(MIMEBodyPartInputStream.java:87)
at org.apache.axiom.attachments.utils.BAAOutputStream.readFrom(BAAOutputStream.java:112)
... 50 more
Web 服务客户端从服务器请求文件并下载文件。这些异常发生在以块形式接收文件时的响应中。在搜索时，我遇到了这里提到的这个修复。 https://issues.apache.org/jira/browse/HTTPCORE-190
但是，仍然会发生异常。那么还有什么可能导致这个异常呢？
更新：
好的，我得到了异常的真正原因。在客户端，如果 jvm 的内存分配较低，则由于 SocketTimeOut，无法处理来自服务器的响应。但例外本身不能强调这一点。在客户端增加堆可以暂时解决问题。