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ClearCase mkview or endview can under rare circumstances cause kernel panic on HP-UX 11.31 (IA)

Troubleshooting


Problem

This technote identifies an issue that can occur in IBM Rational ClearCase (CC) where running view related commands such as mkview or endview repeatedly such as in the case of running scripted tasks can cause panic on HP-UX 11.31 (IA)

Symptom

Repeatedly running view related commands like mkview or endview such as with scripted tasks can cause panic on HP-UX 11.31 (IA)

Cause


The problem is due to a change in a system function in 11.31.

This issue has been identified as a product defect under APAR PK72474.

Diagnosing The Problem


The stack trace from such an event looks like as follows:


Event selected is 0. It was a panic
#0  0xe000000001e226e0:0 in panic_save_regs_switchstack+0x110 ()  

  #1  0xe000000001e1d660:0 in panic+0x410 ()

      at /ux/core/kern/em/svc/shutdown/panic.c:358

  #2  0xe000000002011f40:0 in bad_kern_reference+0xa0 ()

      at /ux/core/kern/common/vm/vasm/vas_proc.c:4028

  #3  0xe0000000012ce3a0:0 in $cold_pfault+0x2c0 ()

  #4  0xe00000000089e3b0:0 in vm_hndlr+0xbf0 ()

      at /ux/core/kern/em/svc/misc/hl_ivt.c:987

  #5  0xe000000001c97780:0 in bubbleup+0x880 ()

  +-------------------------  TRAP  --------------------------

  |  Data Key Miss Fault in kernel mode at pc = 0xe00000015a797bf0

  |  save state pointer = 0x7cee031.0x9fffffff7f7e7600

  +-----------------------------------------------------------

  #6  0xe00000015a797bf0:0 in mvfs::mfs_dnc_flushvw+0xc00 ()

      at ../mvfs_dncops.c:2479

  #7  0xe00000015a77c450:0 in mvfs::mfs_mnflushvw+0x560 ()

      at ../mvfs_mnode.c:4327

  #8  0xe00000015a7afd60:0 in mvfs::mvfs_do_inval+0xd70 ()

      at ../mvfs_mioctl.c:887

  #9  0xe00000015a7b4630:0 in mvfs::mvfs_ioinval+0x390 ()

      at ../mvfs_mioctl.c:1875

  #10 0xe00000015a7b01f0:0 in mvfs::mvfs_mioctl+0x330 ()

      at ../mvfs_mioctl.c:1023

  #11 0xe00000015a72f150:0 in mvfs::mvfs_ioctlv_subr+0x5a0 ()

      at ../mvfs_vnodeops.c:2617

  #12 0xe00000015a72fd70:0 in mvfs::mfs_ioctlv+0xb0 ()

      at ../mvfs_vnodeops.c:2693

  #13 0xe00000015a7d0770:0 in mvfs::mfs_hpux_ioctl+0x90 ()

      at ../mvfs_mdep_hpux11.c:1376

  #14 0xe0000000007226d0:0 in vno_ioctl+0x370 ()

      at /ux/core/kern/common/fs/vfs/vfs_io.c:223

  #15 0xe0000000007633f0:0 in ioctl+0x3d0 ()

      at /ux/core/kern/common/fs/vfs/sys_gen.c:694

  #16 0xe000000000845d00:0 in syscall+0x560 ()

      at /ux/core/kern/common/svc/scall/syscall.c:1731

  #17 0xe0000001085c4480 in ??

Resolving The Problem

The defect has been resolved in the following ClearCase updates:




ClearCase 7.0.1
ClearCase 7.0.0

[{"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"Not Applicable","Platform":[{"code":"PF010","label":"HP-UX"}],"Version":"7.0.1.2","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
16 June 2018

UID

swg21327756