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  1. MariaDB Server
  2. MDEV-14121

Assertion failure 'slot != NULL' in os_aio_linux_collect() during main.index_merge_innodb

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      http://buildbot.askmonty.org/buildbot/builders/kvm-bintar-trusty-amd64/builds/3212/steps/test/logs/stdio

      main.index_merge_innodb 'xtradb'         w2 [ fail ]
              Test ended at 2017-10-24 20:53:56
       
      CURRENT_TEST: main.index_merge_innodb
      mysqltest: At line 66: query 'INSERT INTO t1(a,b) SELECT a,b FROM t1' failed: 2013: Lost connection to MySQL server during query
      ----------SERVER LOG START-----------
      2017-10-24 20:53:56 7fdac6ba6700  InnoDB: Assertion failure in thread 140577613702912 in file os0file.cc line 5128
      InnoDB: Failing assertion: slot != NULL
      

      The failing assertion is in os_aio_linux_collect():

      	/* Initialize the events. The timeout value is arbitrary.
      	We probably need to experiment with it a little. */
      	memset(events, 0, sizeof(*events) * seg_size);
      	timeout.tv_sec = 0;
      	timeout.tv_nsec = OS_AIO_REAP_TIMEOUT;
       
      	ret = io_getevents(io_ctx, 1, seg_size, events, &timeout);
       
      	if (ret > 0) {
      		for (i = 0; i < ret; i++) {
      			os_aio_slot_t*	slot;
      			struct iocb*	control;
       
      			control = (struct iocb*) events[i].obj;
      			ut_a(control != NULL);
       
      			slot = (os_aio_slot_t*) control->data;
       
      			/* Some sanity checks. */
      			ut_a(slot != NULL);
      

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              marko Marko Mäkelä
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