APAR status
Closed as program error.
Error description
When performing builds on large multiprocessor systems (> 64 cores), clearmake may hang on exit if an incoming signal arrives immediately before the signal handler thread is shut down... Attaching the a debugger to the stuck process reveals that the signal handler thread is attempting to allocate memory: #0 0x00006e3ff2b60dce in _lll_lock_wait_private () from /lib64/libc.so.6 #1 0x00006e3ff2aec138 in _L_lock_9164 () from /lib64/libc.so.6 #2 0x00006e3ff2ae9a32 in malloc () from /lib64/libc.so.6 ... <Signal handler called> ... The main thread of the program is attempting to free memory as part of shutting down the signal handler thread, and the __int_free() call and the malloc() call are apparently deadlocked. According to the POSIX standard, malloc() is not async-signal-safe and should not be called from within a signal handler.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * Users of ClearCase / clearmake. * **************************************************************** * PROBLEM DESCRIPTION: * * ClearCase was not properly handling events received during * * shutdown. * **************************************************************** * RECOMMENDATION: * ****************************************************************
Problem conclusion
A fix is available in ClearCase versions 9.0.1.12 9.0.2.4 and 9.1.0.1
Temporary fix
Comments
APAR Information
APAR number
PH27989
Reported component name
CLEARCASE WIN
Reported component ID
5724G2900
Reported release
901
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-07-29
Closed date
2021-07-02
Last modified date
2021-07-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
CLEARCASE WIN
Fixed component ID
5724G2900
Applicable component levels
[{"Type":"MASTER","Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"All Versions"}]
Document Information
Modified date:
03 July 2021