On February 2, 2017 7:05:07 AM GMT+01:00, Sudheera Palihakkara <catchsudhe...@gmail.com> wrote: >Hi all, > >I'm currently using httpcore-nio 4.4 for a proxy-like application and >make >use of the file channels when content transferring. Recently I have >profiled my code under a high concurrent load and observed few unusual >thread blocking occurrences. Stack traces are listed below. > >*I/O threads* > >S-I/O-dispatcher-1 [BLOCKED] >sun.nio.ch.EPollSelectorImpl.doSelect(long) EPollSelectorImpl.java:88 >java.lang.Thread.run() Thread.java:745 > >S-I/O-dispatcher-5 [BLOCKED] >org.apache.http.impl.nio.reactor.IOSessionImpl.setEvent(int) >IOSessionImpl.java:164 >org.apache.http.impl.nio.DefaultNHttpClientConnection.submitRequest(HttpRequest) >DefaultNHttpClientConnection.java:339 > >*Worker threds* > >pool-2-thread-99 [BLOCKED] >sun.nio.ch.EPollArrayWrapper.setInterest(int, int) >EPollArrayWrapper.java:213 >org.apache.http.nio.protocol.HttpAsyncService$HttpAsyncExchangeImpl.submitResponse(HttpAsyncResponseProducer) >HttpAsyncService.java:1037 > >pool-2-thread-96 [BLOCKED] >sun.nio.ch.EPollSelectorImpl.wakeup() EPollSelectorImpl.java:191 >org.apache.http.nio.protocol.HttpAsyncService$HttpAsyncExchangeImpl.submitResponse(HttpAsyncResponseProducer) >HttpAsyncService.java:1037 > >Previously I have used httpcore-nio 4.2.5 for the same application and >did >not encountered any such thread blockings. Can you help me out to >figure >out what might be the issue here? Thank you very much.
Synchronized sections of code can cause threads to block on the synchronization object under load. This does not necessarily mean there is a problem. Oleg -- Sent from my Android device with K-9 Mail. Please excuse my brevity. --------------------------------------------------------------------- To unsubscribe, e-mail: httpclient-users-unsubscr...@hc.apache.org For additional commands, e-mail: httpclient-users-h...@hc.apache.org
