Error While Sending Message Java.io.ioexception Unable To Create A Socket
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Communication Over Https Unable To Create A Socket Sap
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HandlingSample CodeSSL GuideThreadingTrouble ShootingTutorialASFFoundationSponsor ApacheThanksProject DocumentationAboutProject InfoProject ReportsDevelopment ProcessLegendExternal LinkOpens in a new windowException handling There are two main type of exceptions that the user of HttpClient may encounter when executing http://hc.apache.org/httpclient-3.x/exception-handling.html HTTP methods: transport exceptions protocol exceptions Not all of these exceptions will be propagated to the user in regular HttpClient use. Exceptions handled internally http://www-01.ibm.com/support/docview.wss?uid=swg21233894 by HttpClient are marked below as INTERNAL. Transport exceptions Protocol exceptions HTTP transport safety Automatic exception recovery Custom exception handler Transport exceptions Transport unable to exceptions are those caused by input/output failures such as an unreliable connection or an inability to complete the execution of an HTTP method within the given time constraint (socket timeout). Generally transport exceptions are non-fatal and may be recovered from by retrying the failed method. However, unable to create special care must be taken when recovering from exceptions in non-idempotent methods (refer to HTTP transport safety for details). java.io.IOException Generic transport exceptions in HttpClient are represented by the standard Java java.io.IOException class or its sub classes such as java.net.SocketException and java.net.InterruptedIOException. In addition to standard input/output exception classes HttpClient defines several custom transport exceptions that convey HttpClient specific information. org.apache.commons.httpclient.NoHttpResponseException java.io.IOException +- org.apache.commons.httpclient.NoHttpResponseException In some circumstances, usually when under heavy load, the web server may be able to receive requests but unable to process them. A lack of sufficient resources like worker threads is a good example. This may cause the server to drop the connection to the client without giving any response. HttpClient throws NoHttpResponseException when it encounters such a condition. In most cases it is safe to retry a method that failed with NoHttpResponseException. org.apache.commons.httpclient.Co
java.io.IOException TRAS0014I Technote (troubleshooting) Problem(Abstract) IOException,SocketTimeoutException results from Intermediary Server timeouts, Network Problems and Configuration Tuning problems on Client and Server ends. Resolving the problem Client Timers, connectionIdleTimeout and syncTimeout: HttpOutboundC 1 WSWS3228E: Error: Exception: java.io.IOException: Connection close: Read failed. Possible end of stream encountered. ... In this situation, the keep alive on the http client is very low, 3 or so seconds. This closes the socket, but the web services engine does not recognize this as being closed and tries to reuse it, resulting in exceptions like: WSE JVM or HttpOutboundServiceContextImpl should recognize the current state of TCP connection... What is relevant is the value of the web services client property named com.ibm.websphere.webservices.http.connectionIdleTimeout, a JVM system property. What this means is that the client-side engine allows the HTTP outbound connection object--the object responsible for sending SOAP over HTTP requests and reading resulting responses--to remain idle for x seconds. If the last time the outbound connection object was used is less than x seconds, the engine will reuse this same object for performance reasons (and to provide persistent connections as part of HTTP/1.1). But if the server or intermediate server for http client, closes the Socket prior to x seconds, then the engine will not know that the Socket is closed until it actually tries to read or write to the Socket and encounters the IOException. This is the nature of Java™, not a limitation or bug in the web services engine or HTTP channel framework. There is no way for either of those components to know if the Socket is open or closed until it tries a request, and is either successful in reading from or writing to the Socket, or catches an IOException when it tries to do so. When the latter happens, the client-side engine marks that the connection object currently in use to be destroyed. A new connection object will be created for subsequent requests. There are two options for avoiding the IOException: On the web services client side, set JVM system property com.ibm.websphere.webservices.http.connectionIdleTimeout to a value lower than KeepAlive or timeout value effecting http client. The IBM WebSphere Application Server Information Center has an article documenting how to do this at: http://pic.dhe.ibm.com/infocenter/wasinfo/v8r0/index.jsp?topic=%2Fcom.ibm.websphere.nd.doc%2