We have a big problem with the Apache 2.2 WebObjects adaptor on our Solaris 10 web servers. We are using the 'worker' MPM but when the sites get busy nearly every Apache thread is waiting for a shared memory lock to call the function that reads the adaptor config. The remaining threads are in the fcntl function trying to lock a section of shared memory. See below for a couple of example thread stacks.
I read in several posts that fcntl on Solaris 10 causes deadlocks under high load and that the problem is worse with the 'worker MPM'. The recommend locking mechanism for Solaris seems to be to use pthreads. I know that at least a few list members are running with the Solaris adaptor. My questions: * Has anyone experienced this problem and found a solution? * Anyone using the 'worker' MPM or do people still use pre-fork (I don't think this a thread safety problem). * Any help or suggestions? Especially, any tips on rewriting to use pthreads? -- James feec5638 fcntl (d8, 7, 2abe588) feeb8258 fcntl (d8, 1, fefcc200, 4d6880, 1580, 20a58) + 84 febe8570 lock_file_section (d8, 4d6880, 14, 2abe588, 147c, 2) + 58 febe8e14 WOShmem_lock (2abe588, 14, 1, 4d6880, 1580, 1400) + d4 febef410 ac_readConfiguration (1, fffee980, 11400, fec08f74, 1d84, 1c00) + 40 febe71cc _runRequest (fc9fb9c4, 0, 2d77168, 2d18b40, 5, 0) + 260 febe6a0c tr_handleRequest (2d18b40, 27226f0, fc9fbc50, 0, 5, 2) + 30c febf42a8 WebObjects_handler (2721208, 0, 10000, 0, 2d18b40, fec08f74) + 48c 00041484 ap_run_handler (2721208, febf3e1c, 7b578, 6b5a10, 2, 8) + 40 00041ab4 ap_invoke_handler (2721208, 0, 2721208, 0, 6b58bc, 79c00) + ec 0005132c ap_process_request (2721208, 79400, 4, 1, 0, 2721208) + 54 0004d9a4 ap_process_http_connection (26b61c0, 7c000, 0, 1, 79548, 5) + 78 00049654 ap_process_connection (26b61c0, 26b5f10, 6b5d90, 0, 7bd98, 6b5d78) + d4 00057558 worker_thread (14d888, ad7, fc9fbf98, 7c24c, 2b, 17) + 280 feec5238 _lwp_start (0, 0, 0, 0, 0, 0) feec52d8 lwp_park (0, 0, 0) feebf350 cond_wait_queue (ef50a8, ef5090, 0, 0, 1c00, 0) + 28 feebf874 cond_wait (ef50a8, ef5090, ef50a8, 0, fec0a8f8, 3) + 10 feebf8b0 pthread_cond_wait (ef50a8, ef5090, ef5090, 0, 1c00, 3a) + 8 febf2730 _WA_lock (ef5088, febf5974, ef50a8, 0, fec0a8f8, 3) + 90 febe9494 sha_lock (100, 4, fffeca64, fec08f74, ef3230, 13400) + 5c febedd84 ac_findApplication (fe0fb54c, 4, fec0acfc, fec08f74, 0, fec0a474) + 70 febe6794 tr_handleRequest (2402c38, 30bbec0, fe0fb7d8, 798f0, ffffffff, 14400) + 94 febf42a8 WebObjects_handler (30baf40, 0, 10000, 0, 2402c38, fec08f74) + 48c 00041484 ap_run_handler (30baf40, febf3e1c, 7b578, 6b5a10, 2, 8) + 40 00041ab4 ap_invoke_handler (30baf40, 0, 2ba5f10, 2ba5348, 30baf40, 2b824d8) + ec 0003f080 ap_run_sub_req (ffffffff, 30bb0e8, 20, 0, 30bc370, 30baf40) + 3c fed336d8 handle_include (2ba4d20, 10800, 2ba5f10, 2ba5348, 30baf40, 2b824d8) + 334 fed378f8 send_parsed_content (11a8, 7c021, 2ba4d20, 2c01898, 2ba5f14, 2ba5f10) + 1080 0003afb0 default_handler (0, 2c01898, 2b91e10, 2b7c748, 2b7e598, 2ba5328) + 4a8 00041484 ap_run_handler (2c01898, 3ab08, 7b578, 6b5a74, 7, 8) + 40 00041ab4 ap_invoke_handler (2c01898, 0, 2c01898, 2b9eb80, ffb1b6a0, 4e4960) + ec 00051a58 ap_internal_redirect (0, 2c01898, fe0fbd10, fe0fbcac, 1, 2c01898) + 44 febab53c handler_redirect (2b9eb80, ffffffff, febbd238, 2c01560, fffefd64, 10000) + 90 00041484 ap_run_handler (2b9eb80, febab4ac, 7b578, 6b5a4c, 5, 8) + 40 00041ab4 ap_invoke_handler (2b9eb80, 0, 2b9eb80, 0, 6b58bc, 79c00) + ec 0005132c ap_process_request (2b9eb80, 79400, 4, 1, 0, 2b9eb80) + 54 0004d9a4 ap_process_http_connection (2b7c748, 7c000, 0, 1, 79548, 5) + 78 00049654 ap_process_connection (2b7c748, 2b7c498, 6b5d90, 0, 7bd98, 6b5d78) + d4 00057558 worker_thread (14d5a8, a00, fe0fbf98, 7c24c, 28, 0) + 280 feec5238 _lwp_start (0, 0, 0, 0, 0, 0) _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
