APAR status
Closed as program error.
Error description
When working in a IBM Rational ClearCase dynamic view on Red Hat 7.x, some operations may be subject to delays of seconds or even hours. The problem is typically noticed on commands that use a readdir system call to enumerate directory contents inside a ClearCase view, such as a cp or ls command. When the slowdown (apparent "hang") occurs, the kernel stack (cat /proc/<pid>/stack) may show the process waiting in the kernel RPC code for a memory allocation call to return. WORKAROUND: Modifying the kernel tuning parameters vfs_cache_pressure and min_free_kbytes may reduce occurrences of this problem. Please contact ClearCase customer support for further information.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * Users of ClearCase dynamic views on Red Hat Linux 7. * **************************************************************** * PROBLEM DESCRIPTION: * * When working in a dynamic view on Red Hat 7.x, a problem * * allocating buffer space for kernel RPC data can cause delays * * of seconds to hours to occur during some ClearCase * * operations. * **************************************************************** * RECOMMENDATION: * ****************************************************************
Problem conclusion
This problem is fixed in ClearCase 9.0.1.12, 9.0.2.4, and 9.1.0.1.
Temporary fix
Comments
APAR Information
APAR number
PH34446
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
2021-02-12
Closed date
2021-06-29
Last modified date
2021-06-29
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
[{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"901"}]
Document Information
Modified date:
30 June 2021