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  1. IMPALA
  2. IMPALA-3677

Write minidump on SIGUSR1

        Details

        • Type: Improvement
        • Status: Resolved
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: Impala 2.6.0
        • Fix Version/s: Impala 2.7.0
        • Component/s: Backend
        • Labels:
          None
        • Docs Text:
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          Let's consider documenting this as a new debugging capability for expert admins. I don't think it would be very popular as it's pretty low level, but in the past we were criticized by expert admins about our lack of documentation around more advanced troubleshooting capabilities, such as the /memz page and such.
          Show
          Let's consider documenting this as a new debugging capability for expert admins. I don't think it would be very popular as it's pretty low level, but in the past we were criticized by expert admins about our lack of documentation around more advanced troubleshooting capabilities, such as the /memz page and such.
        • Target Version:

          Description

          IMPALA-3538 outlines different possible ways to manually trigger writing a minidump file. This Jira tracks writing minidump files when receiving SIGUSR1. Currently we don't use SIGUSR1 for anything else.

            Issue Links

            Child-Issue

            Improvement - An improvement or enhancement to an existing feature or task. IMPALA-3538 Add Way to Trigger Minidump Creation

            • Minor - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

              Activity

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              Permalink
              lv Lars Volker added a comment -

              bharath v - I think this would help us debug hangs / freezes by being able to trigger minidump creation. Is there a way to include this in 2.6.2?

              Show
              lv Lars Volker added a comment - bharath v - I think this would help us debug hangs / freezes by being able to trigger minidump creation. Is there a way to include this in 2.6.2?
              Hide
              Permalink
              lv Lars Volker added a comment -

              Harrison Sheinblatt - I would like to suggest including this in 2.6.2. Is there anything I need to do for that besides setting the target version?

              Show
              lv Lars Volker added a comment - Harrison Sheinblatt - I would like to suggest including this in 2.6.2. Is there anything I need to do for that besides setting the target version?
              Hide
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              lv Lars Volker added a comment -

              IMPALA-3677: Write minidump on SIGUSR1

              Sending SIGUSR1 to any of the impala daemons (catalogd, impalad,
              statestored) will trigger a minidump write.

              The hotspot JVM also uses SIGUSR1 internally. However the documentation
              explains, that existing signal handlers will be transparently wrapped by
              the JVM and no spurious signals should be received by the daemon signal
              handler:
              http://www.oracle.com/technetwork/java/javase/signals-139944.html

              Example: killall -SIGUSR1 catalogd

              Change-Id: I40149e48e391451de21a5c8bda18e2307fc89513
              Reviewed-on: http://gerrit.cloudera.org:8080/3312
              Reviewed-by: Lars Volker <lv@cloudera.com>
              Tested-by: Internal Jenkins

              Show
              lv Lars Volker added a comment - IMPALA-3677 : Write minidump on SIGUSR1 Sending SIGUSR1 to any of the impala daemons (catalogd, impalad, statestored) will trigger a minidump write. The hotspot JVM also uses SIGUSR1 internally. However the documentation explains, that existing signal handlers will be transparently wrapped by the JVM and no spurious signals should be received by the daemon signal handler: http://www.oracle.com/technetwork/java/javase/signals-139944.html Example: killall -SIGUSR1 catalogd Change-Id: I40149e48e391451de21a5c8bda18e2307fc89513 Reviewed-on: http://gerrit.cloudera.org:8080/3312 Reviewed-by: Lars Volker <lv@cloudera.com> Tested-by: Internal Jenkins

                People

                • Assignee:
                  lv Lars Volker
                  Reporter:
                  lv Lars Volker
                • Votes:
                  0 Vote for this issue
                  Watchers:
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                  Dates

                  • Created:
                    Updated:
                    Resolved:

                    Development