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http://issues.apache.org/bugzilla/show_bug.cgi?id=35944 ------- Additional Comments From [EMAIL PROTECTED] 2005-08-01 16:13 ------- hey there. ok. i think i'm getting a handle on this and maybe there is a more serious problem lurking in the code... i might be wrong but bear with me. the situation seems to be this: i'm repeatedly connecting to the same server using a multi threaded connection manager which, however, is only managing a single thread. but, the server, or my connection, is unstable and goes down. here's the tail of the log from the session in question: ===================== ... 07/30 01:18:12 DEBUG HttpMethodBase [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - enter HttpMethodBase.readResponseBody(HttpConnection) 07/30 01:18:12 DEBUG HttpConnection [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - enter HttpConnection.getResponseInputStream() 07/30 01:18:12 DEBUG HttpMethodBase [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - enter HttpMethodBase.canResponseHaveBody(int) 07/30 01:18:12 DEBUG HttpConnection [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - enter HttpConnection.close() 07/30 01:18:12 DEBUG HttpConnection [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - enter HttpConnection.closeSockedAndStreams() 07/30 01:18:12 DEBUG HttpMethodBase [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - Resorting to protocol version default close connection policy 07/30 01:18:12 DEBUG HttpMethodBase [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - Should NOT close connection, using HTTP/1.1 07/30 01:18:12 DEBUG HttpConnection [5948 http://humboldt.craigslist.org:80/sfo/eby/ 3] - enter HttpConnection.isResponseAvailable() 07/30 01:18:14 DEBUG GetMethod [5948 http://humboldt.craigslist.org:80/sfo/eby/mis/ 3] - enter GetMethod(String) 07/30 01:18:14 DEBUG HttpMethodBase [5948 http://humboldt.craigslist.org:80/sfo/eby/mis/ 3] - HttpMethodBase.addRequestHeader(Header) 07/30 01:18:14 DEBUG HttpClient [5948 http://humboldt.craigslist.org:80/sfo/eby/mis/ 3] - enter HttpClient.executeMethod(HttpMethod) 07/30 01:18:14 DEBUG HttpClient [5948 http://humboldt.craigslist.org:80/sfo/eby/mis/ 3] - enter HttpClient.executeMethod(HostConfiguration,HttpMethod,HttpState) 07/30 01:18:14 DEBUG MultiThreadedHttpConnectionManager [5948 http://humboldt.craigslist.org: 80/sfo/eby/mis/ 3] - enter HttpConnectionManager.getConnectionWithTimeout(HostConfiguration, long) 07/30 01:18:14 DEBUG MultiThreadedHttpConnectionManager [5948 http://humboldt.craigslist.org: 80/sfo/eby/mis/ 3] - HttpConnectionManager.getConnection: config = HostConfiguration [host=http://humboldt.craigslist.org], timeout = 0 07/30 01:18:14 DEBUG MultiThreadedHttpConnectionManager [5948 http://humboldt.craigslist.org: 80/sfo/eby/mis/ 3] - enter HttpConnectionManager.ConnectionPool.getHostPool(HostConfiguration) 07/30 01:18:14 DEBUG MultiThreadedHttpConnectionManager [5948 http://humboldt.craigslist.org: 80/sfo/eby/mis/ 3] - Unable to get a connection, waiting..., hostConfig=HostConfiguration [host=http://humboldt.craigslist.org] ========================= (that's where it hung) I think the key is that the connection manager is only handing one thread. your assumption is that eventually there'll be another open connection that closes and notifies() the connection manager so that it stops waiting. but what if there aren't any other running threads? there's nothing waiting for an ACK since our only connecting thread is stopped in Thread.wait(0)... so what's going to pop us out of the wait? Now, my understanding is fuzzy, especially the effect of the loss of internet connectivity on the connection manager that's running as HTTP 1.1 and not closing connections, but i think there's a genuine deadlock situation with this edge condition of a MultiThreaded...ConnectionManager that's only running one thread. Maybe your answer will be simply "don't use MultiThreaded...ConnectionManager if you only want to run one thread" ;) I'm tempted to REOPEN this but i think i'll leave that as your call... i feel like a salmon in a barrel. cheers, garry -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
