If a client closes the connection before a call mediated by RESTeasy completes, a ClientAbortException will be raised by whatever is trying to write to the socket. This is not an infrequent occurrence (user gets bored waiting for the server to respond and closes their browser window), so it seems that the message should be logged at a level less than ERROR.

Production servers are monitored for failures. One fairly common way to do this is to automatically check the logs for indications that something is going wrong. Something logged at ERROR level will generally set alarm bells ringing. Someone closing their browser window shouldn't be the cause of this.

A stack trace for you enjoyment:

<pre>
09:43:25,015 ERROR [SynchronousDispatcher] failed to execute
javax.ws.rs.WebApplicationException: javax.xml.bind.MarshalException

• with linked exception:
  [ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error]
  at org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.writeTo(AbstractJAXBProvider.java:113)
  at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:117)
  at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.write(GZIPEncodingInterceptor.java:48)
  at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123)
  at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:184)
  at org.jboss.resteasy.core.SynchronousDispatcher.writeJaxrsResponse(SynchronousDispatcher.java:403)
  at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:340)
  at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:103)
  at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:114)
  at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:70)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at com.ftid.sper.mgmt.ProfilingFilter.doFilter(ProfilingFilter.java:42)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  at java.lang.Thread.run(Thread.java:595)
  Caused by: javax.xml.bind.MarshalException
• with linked exception:
  [ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error]
  at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:297)
  at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:221)
  at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:70)
  at org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.writeTo(AbstractJAXBProvider.java:108)
  ... 31 more
  Caused by: ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error
  at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:358)
  at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
  at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:387)
  at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:370)
  at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89)
  at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.write(UTF8XmlOutput.java:344)
  at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.write(UTF8XmlOutput.java:336)
  at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.endTag(UTF8XmlOutput.java:223)
  at com.sun.xml.bind.v2.runtime.output.NamespaceContextImpl$Element.endElement(NamespaceContextImpl.java:434)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.endElement(XMLSerializer.java:281)
  at com.sun.xml.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:116)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:619)
  at com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.serializeItem(ArrayElementNodeProperty.java:29)
  at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:132)
  at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.serializeBody(ArrayERProperty.java:101)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:283)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:532)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:276)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:461)
  at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:292)
  ... 34 more
  Caused by: java.net.SocketException: Software caused connection abort: socket write error
  at java.net.SocketOutputStream.socketWrite0(Native Method)
  at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
  at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
  at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:764)
  at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:124)
  at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:570)
  at org.apache.coyote.Response.doWrite(Response.java:560)
  at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353)
  ... 55 more
  09:43:25,984 INFO [STDOUT] Message: Servlet.service() for servlet Resteasy threw exception
  09:43:25,984 ERROR [[Resteasy]] Servlet.service() for servlet Resteasy threw exception
  org.jboss.resteasy.spi.UnhandledException: Request was committed couldn't handle exception
  at org.jboss.resteasy.core.SynchronousDispatcher.handleWebApplicationException(SynchronousDispatcher.java:276)
  at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:167)
  at org.jboss.resteasy.core.SynchronousDispatcher.handleWriteResponseException(SynchronousDispatcher.java:151)
  at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:344)
  at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:103)
  at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:114)
  at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:70)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at com.ftid.sper.mgmt.ProfilingFilter.doFilter(ProfilingFilter.java:42)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  at java.lang.Thread.run(Thread.java:595)
  Caused by: javax.ws.rs.WebApplicationException: javax.xml.bind.MarshalException
• with linked exception:
  [ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error]
  at org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.writeTo(AbstractJAXBProvider.java:113)
  at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:117)
  at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.write(GZIPEncodingInterceptor.java:48)
  at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123)
  at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:184)
  at org.jboss.resteasy.core.SynchronousDispatcher.writeJaxrsResponse(SynchronousDispatcher.java:403)
  at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:340)
  ... 25 more
  Caused by: javax.xml.bind.MarshalException
• with linked exception:
  [ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error]
  at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:297)
  at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:221)
  at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:70)
  at org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.writeTo(AbstractJAXBProvider.java:108)
  ... 31 more
  Caused by: ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error
  at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:358)
  at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
  at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:387)
  at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:370)
  at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89)
  at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.write(UTF8XmlOutput.java:344)
  at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.write(UTF8XmlOutput.java:336)
  at com.sun.xml.bind.v2.runtime.output.UTF8XmlOutput.endTag(UTF8XmlOutput.java:223)
  at com.sun.xml.bind.v2.runtime.output.NamespaceContextImpl$Element.endElement(NamespaceContextImpl.java:434)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.endElement(XMLSerializer.java:281)
  at com.sun.xml.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:116)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:619)
  at com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.serializeItem(ArrayElementNodeProperty.java:29)
  at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:132)
  at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.serializeBody(ArrayERProperty.java:101)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:283)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:532)
  at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:276)
  at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:461)
  at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:292)
  ... 34 more
  Caused by: java.net.SocketException: Software caused connection abort: socket write error
  at java.net.SocketOutputStream.socketWrite0(Native Method)
  at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
  at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
  at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:764)
  at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:124)
  at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:570)
  at org.apache.coyote.Response.doWrite(Response.java:560)
  at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353)
  ... 55 more
  </pre>