segfault occurs with nbd-server process. How to find the root cause?

Solution Verified - Updated -

Issue

  • segfault occurs with nbd-server process. How to find the root cause?
    Sample log

    kernel: nbd-server[15300]: segfault at 00000000082d20f8 rip 00000000009f06d1 rsp 000000005577d2e4 error 4
    

    When this messages logged, another node might have I/O error in /var/log/messages like

    kernel: nbd17: Receive control failed (result -104)
    kernel: nbd17: shutting down socket
    kernel: end_request: I/O error, dev nbd17, sector 83328128
    kernel: raid1: Disk failure on nbd17, disabling device. 
    kernel:   Operation continuing on 1 devices
    kernel: end_request: I/O error, dev nbd17, sector 83328112
    kernel: end_request: I/O error, dev nbd17, sector 140966752
    kernel: end_request: I/O error, dev nbd17, sector 107277384
    kernel: end_request: I/O error, dev nbd17, sector 89877648
    

Environment

  • Red Hat Enterprise Linux 5
  • LifeKeeper
  • nbd-server

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