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  1. MariaDB Connector/C
  2. CONC-154

Repeated use of prepared statements hangs in vio_real_read

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.1, 3.0.0, 2.2.0
    • Fix Version/s: 2.2.3, 3.0.1
    • Component/s: None
    • Labels:
      None
    • Environment:
      Centos6 and Centos7

      Description

      I have attached a sample project with a setup.sql that can be used to setup the tables for the statements and a simple main.cpp that reuses a prepared statement to query a table.

      The second call to mysql_stmt_execute will hang indefinitely in vio_real_read.

      This code works perfectly fine if linked against the libmariadbclient from the mariadb source
      but hangs if linked against the connector. I've tried 2.1.0, 2.2.0 and a github checkout of 3.0.0, binary distributions and self-compiled.

      Here it hangs:
      (gdb) bt
      #0 0x00007f4193b337c0 in __read_nocancel () from /lib64/libpthread.so.0
      #1 0x0000000000420266 in vio_real_read ()
      #2 0x0000000000420362 in vio_read ()
      #3 0x0000000000420865 in my_real_read ()
      #4 0x000000000042149d in my_net_read ()
      #5 0x000000000040c372 in net_safe_read ()
      #6 0x000000000041726d in mthd_stmt_flush_unbuffered ()
      #7 0x00000000004195a3 in mysql_stmt_execute ()
      #8 0x000000000040b0dc in main ()

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            Assignee:
            georg Georg Richter
            Reporter:
            Panke Tobias Pankrath
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              Dates

              Created:
              Updated:
              Resolved: