|
Problem IC81657
|
Status: Closed |
ON LINUX PLATFORMS, DB2 FCM THREADS (DB2FMCS AND DB2FCMR) MAY HANG IN SELECT() SYSTEM CALL |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
On Linux Platforms, DB2 FCM threads (db2fmcs and db2fcmr) may
hang in select() system call due to possibly reaching file
descriptor limit . The symptom would be hard to confirm via a
stack trace of the FCM threads since the stack generation tools
(db2pd -stack, pstack, gstack, gcore) will all clear up the
hang.
With this APAR db2fcm (s and r) threads will have the ability
to use epoll() instead of select() since epoll() does not have
the file descriptor limit that select() has. This change will
not be by default but instead enabled via a registry variable -
DB2_FCM_FDPOLL. The default for this registry variable will be
FALSE on Linux. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All DB2 Users in DPF Linux environment or with *
* INTRA_PARALLEL enabled *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Please upgrade to DB2 Version 9.5 Fix Pack 10 or later *
**************************************************************** |
| Local Fix: |
|
| Solution |
Problem was first fixed in DB2 Version 9.5 Fix Pack 10 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 24.02.2012
29.08.2012
29.08.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP10
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.5.0.10
|
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