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  1. Core Server
  2. SERVER-36230

Waits-for graph no longer being generated by hang_analyzer.py script

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    • Fully Compatible
    • TIG 2018-08-13
    • 0
    • 2

    Description

      In BF-9986, we saw many threads waiting on DB locks, but the hang analyzer cannot generate the graph for us. The lock manager dumps the information though.

       [2018/07/18 12:40:44.821] warning: target file /proc/17238/cmdline contained unexpected null characters
      		 
       [2018/07/18 12:40:44.821] Saved corefile dump_mongod.17238.core
      		 
       [2018/07/18 12:41:07.364] Running Hang Analyzer Supplement - MongoDBDumpLocks
      		 
       [2018/07/18 12:41:07.364] Not generating the digraph, since the lock graph is empty
      		 
       [2018/07/18 12:41:07.364] Running Print JavaScript Stack Supplement
      		 
       [2018/07/18 12:41:07.364] Detaching from program: /data/mci/d8572849d2ad8ce1953117503927f065/src/mongod, process 17238
      		 
       [2018/07/18 12:41:07.491] Done analyzing mongod process with PID 17238
      		 
       [2018/07/18 12:41:07.491] Debugger /opt/mongodbtoolchain/gdb/bin/gdb, analyzing mongod process with PID 17241

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          is caused by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-36011 remove MMAPv1 support from the lock manager

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-36356 Improve test coverage for hang analyzer script to cover waits-for scenario

          • Major - P3 - Major loss of function.
          • Closed

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              max.hirschhorn@mongodb.com Max Hirschhorn
              siyuan.zhou@mongodb.com Siyuan Zhou
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                Updated:
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