Armin, You should always release the connection. This puts the connection back into the connection pool. It does not actually close the connection. For the read exception, there was a recent thread about clearing out idle connections. That's what you need to do to avoid socket exceptions under low load levels.
--Steve -----Original Message----- From: Wittmann Armin (BI) [mailto:[EMAIL PROTECTED] Sent: Monday, December 04, 2006 2:51 AM To: HttpClient User Discussion Subject: SocketTimeoutException: Read timed out Hi I am using commons-httpclient in a 24x7 environment that does send simple http-POST-requests with about 7 NameValuePairs. Unfortunately I get sometimes the following error java.net.SocketTimeoutException: Read timed out (see stack trace below) Worse is that this error cannot be reproduced in development stage. It does occur mostly after a longer time of inactivity or under high test load (=some 5 requests per second). The average load in production is very low (e.g. 1 request per 10 seconds). Fortunately the server recovers from this phase of malfunction after some seconds and goes on working well. Does anybody have the same effects or is it possible that I am not programming API-conform. Here is the extract of my code inside the class CommonsHttpClient: (variables with prefix '_' are field variables in this class initialized in its constructor [that reads out some properties from file]) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< public String sendHttpRequest(int pGetOrPost, NameValuePair pKeyValuePairs) throws LBSystemException { HttpConnectionManager connectionManager = new SimpleHttpConnectionManager(); connectionManager.setParams(_connectionManagerParams); HttpClient client = new HttpClient(_clientParams, connectionManager); client.setHostConfiguration(_hostConfiguration); HttpMethod method = null; if (pGetOrPost == 0) { method = new PostMethod(); ((PostMethod) method).setRequestBody(pairs); } else if (pGetOrPost == 1) { method = new GetMethod(); method.setQueryString(pairs); } method.setPath(_contextPath); method.setParams(_methodParams); int statusCode = -1; boolean failed = false; try { statusCode = client.executeMethod(method); } catch (Exception e) { failed = true; throw new MyException(p + "perform http.request failed.", e); } finally { try { if (failed) { method.abort(); try { method.releaseConnection(); } catch (Exception e) { _log.warning(p + "releasing connection after evaluating http.request failed (failed=" + failed + "):", e); } } } catch (Exception e) { _log.warning(p + "aborting http.POST after failure raised an exception:", e); } client.setHttpConnectionManager(null); client = null; } } <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Notice: I do release the connection only in case of an exception! We checked with TCPDUMP on the receiving server. It does not not receive anything in such a error case. This observation is not very precise since we tried to estimate when it will occur (mostly in the morning with the first usage). And now the stacktrace: Caused by: java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(Unknown Source) at com.sun.net.ssl.internal.ssl.InputRecord.readFully(Unknown Source) at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(Unknown Source) at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:77) at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:105) at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.jav a:1115) at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBa se.java:1832) at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase .java:1590) at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java :995) at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMe thodDirector.java:397) at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMetho dDirector.java:170) at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:3 96) at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:3 24) at ch.ethz.id.bi.fw.common.util.http.CommonsHttpClient.sendHttpRequest(Comm onsHttpClient.java:148) ... 20 more --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
