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  1. Qpid Dispatch
  2. DISPATCH-1135

Router A leaks memory when router B killed and restarted.

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      I set up a 2-node router network, with B connecting to A.

      No clients.

      Repeatedly killing and restarting B – giving 3 seconds after each kill and after each restart for the network to settle down.   Repeated 100 times. The same router A ran for the duration of the test.

      The 'ps' program, run repeatedly on router A, indicated that it was leaking about 82 KB per kill-and-restart.  Using 'qdstat m' on A after each kill-and-restart showed the following difference between iteration 1 and iteration 100.  ( Note, this shows growth of only 44 KB per iteration. )

       

      As far as I looked into the past (about 1 year) I saw similar behavior.

       

      In the chart below, the first column "size" is the number of bytes in a single struct of that type.

      "In-threads" means how many of each struct are currently being used.

       

      Note that, although there are no clients, the routers will be sending some messages to each other.

       

       

      type                size  in-threads   in-threads    item      byte
                                 test 1      test 100     growth    growth
      {{ ======================================================================}}

      qd_buffer_t           536   256           2944        2688   1440768
      {{ qd_message_content_t 1056   128           1216        1088   1148928}}
      {{ qd_iterator_t         160   448           7488        7040   1126400}}
      {{ qd_parsed_field_t      88   256           2880        2624    230912}}
      {{ qdr_delivery_t        248   256           1152         896    222208}}
      {{ qd_message_t          160   256           1088         832    133120}}
      {{ qd_connection_t      2320    32             64          32     74240}}
      {{ qdr_general_work_t     64    64            448         384     24576}}
      {{ qdr_link_t            360   192            256          64     23040}}
      {{ qd_bitmask_t           24   192           1088         896     21504}}
      {{ qdr_connection_work_t  48    64            384         320     15360}}
      {{ qdr_link_work_t        48    64            384         320     15360}}
      {{ qd_link_t              96   128            256         128     12288}}
      {{ qdr_link_ref_t         24    64            448         384      9216}}
      {{ qd_parsed_turbo_t      64   128            256         128      8192}}
      {{ qd_link_ref_t          24    64            256         192      4608}}
      {{ qdr_error_t            24    64            256         192      4608}}
      {{ qd_deferred_call_t     32    64            192         128      4096}}
      {{ qdr_terminus_t         64   192            256          64      4096}}
      {{ qdr_delivery_ref_t     24    64            128          64      1536}}

       

      ( All other structs have zero growth. (Or, in one case, less.) )

       

       

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            • Assignee:
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              Reporter:
              mgoulish michael goulish
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              • Created:
                Updated: