RP/TUX 8.1 - BRIDGE hung because of dead-lock while multithreads mode is enabled and traffic is busy between two BRIDGE
(Doc ID 777064.1)
Last updated on JANUARY 19, 2018
Applies to:Oracle Tuxedo / Tuxedo / Tux 8.1
Information in this document applies to any platform
DESCRIPTION: BRIDGE hung because of dead-lock while multithreads mode is enabled and traffic is busy between two BRIDGE. Two machines are configured as MP mode. nonmaster machine provides TOUPPER service, calls TOUPPER service simultaneously with 30 clients from master machine, and each client will call more than 3000 times. About 3 minutes later, all clients report timeout and exit. Debugging the BRIDGE with dbx, the following message is thrown: (dbx) thread current thread ($thread) is t@1 (dbx) threads > t@1 a l@1 ?() sleep on 0x56db8 in _lwp_sema_wait() t@2 b l@2 ?() running in _signotifywait() t@3 ?() sleep on (unknown) in _reap_wait() t@4 b l@5 _co_timerset() running in private___lwp_cond_wait() t@5 b l@6 brthr_nrloop() sleep on 0x898b0 in _lwp_sema_wait() t@6 b l@7 brthr_nwloop() sleep on 0x89900 in _lwp_sema_wait() (dbx) thread -blockedby t@5 Thread t@5 is blocked by: 0x000898b0 (0x898b0): thread mutex(locked) Lock owned by t@6 (dbx) thread -blockedby t@6 Thread t@6 is blocked by: 0x00089900 (0x89900): thread mutex(locked) Lock owned by t@5 (dbx) detach detaching from process 27547 t@6 is waiting t@5 and t@5 is waiting t@6. This should be a deadlock. And any call to TOUPPER service will be timeout. CONFIGURATION: Tuxedo 8.1 Solaris
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