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  1. MariaDB Server
  2. MDEV-6345

mariadb with oq_graph server crash when running query from 2+ connections

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.0.12
    • Fix Version/s: 10.0.18
    • Labels:
    • Environment:

      Description

      After following the example at https://mariadb.com/kb/en/oqgraph-examples/

      when I run a query ""SELECT * FROM oq_graph WHERE latch='breadth_first' AND origid=1 AND destid=6;"
      from two or more client connections I get ERROR 2013 (HY000): Lost connection to MySQL server during query

      root@duduta:/home/unics# mysqld --debug
      140616 11:47:26 [Warning] 'debug' is disabled in this build
      140616 11:47:26 [Note] InnoDB: Using mutexes to ref count buffer pool pages
      140616 11:47:26 [Note] InnoDB: The InnoDB memory heap is disabled
      140616 11:47:26 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
      140616 11:47:26 [Note] InnoDB: Compressed tables use zlib 1.2.7
      140616 11:47:26 [Note] InnoDB: Using Linux native AIO
      140616 11:47:26 [Note] InnoDB: Using CPU crc32 instructions
      140616 11:47:26 [Note] InnoDB: Initializing buffer pool, size = 256.0M
      140616 11:47:26 [Note] InnoDB: Completed initialization of buffer pool
      140616 11:47:26 [Note] InnoDB: Highest supported file format is Barracuda.
      140616 11:47:26 [Note] InnoDB: 128 rollback segment(s) are active.
      140616 11:47:26 [Note] InnoDB: Waiting for purge to start
      140616 11:47:26 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.17-65.0 started; log sequence number 1411674093
      140616 11:47:26 [Note] Plugin 'FEEDBACK' is disabled.
      140616 11:47:26 [Note] Server socket created on IP: '127.0.0.1'.
      140616 11:47:26 [Note] Event Scheduler: Loaded 0 events
      140616 11:47:26 [Note] Reading of all Master_info entries succeded
      140616 11:47:26 [Note] Added new Master_info '' to hash table
      140616 11:47:26 [Note] mysqld: ready for connections.
      Version: '10.0.12-MariaDB-1~wheezy-log'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution
      2014-06-16 11:47:47 7f40838e2700  InnoDB: Assertion failure in thread 139915061765888 in file ha_innodb.cc line 9254
      InnoDB: Failing assertion: prebuilt->trx == thd_to_trx(ha_thd())
      InnoDB: We intentionally generate a memory trap.
      InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
      InnoDB: If you get repeated assertion failures or crashes, even
      InnoDB: immediately after the mysqld startup, there may be
      InnoDB: corruption in the InnoDB tablespace. Please refer to
      InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
      InnoDB: about forcing recovery.
      140616 11:47:47 [ERROR] mysqld got signal 6 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see http://kb.askmonty.org/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.0.12-MariaDB-1~wheezy-log
      key_buffer_size=134217728
      read_buffer_size=2097152
      max_used_connections=2
      max_threads=102
      thread_count=2
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759849 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x0x7f4060993008
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f40838e1df0 thread_stack 0x48000
      addr2line: 'mysqld': No such file
      mysqld(my_print_stacktrace+0x2b)[0x7f40844736cb]
      mysqld(handle_fatal_signal+0x422)[0x7f4084006482]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030)[0x7f408365a030]
      /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35)[0x7f4081cb5475]
      /lib/x86_64-linux-gnu/libc.so.6(abort+0x180)[0x7f4081cb86f0]
      mysqld(+0x710e89)[0x7f4084199e89]
      /usr/lib/mysql/plugin/ha_oqgraph.so(_ZNK8oqgraph36cursor15record_positionEv+0x36)[0x7f407f9d7e36]
      /usr/lib/mysql/plugin/ha_oqgraph.so(_ZNK8oqgraph310cursor_ptrneERKS0_+0x1b)[0x7f407f9d7ecb]
      /usr/lib/mysql/plugin/ha_oqgraph.so(_ZN5boost19breadth_first_visitIN8oqgraph35graphENS_5queueIySt5dequeIySaIyEEEENS_11bfs_visitorISt4pairINS_20predecessor_recorderINS_24associative_property_mapINS_9unordered13unordered_mapIyyNS_4hashIyEESt8equal_toIyESaIS9_IKyyEEEEEENS_12on_tree_edgeEEEN10open_query12oqgraph_goalILb0ENS_18on_discover_vertexESM_EEEEENS_16two_bit_judy_mapINS1_25vertex_index_property_mapEEEEEvRKT_NS_12graph_traitsISY_E17vertex_descriptorERT0_T1_T2_+0x3e4)[0x7f407f9d2d74]
      /usr/lib/mysql/plugin/ha_oqgraph.so(_ZN10open_query7oqgraph6searchEPiPyS2_+0xcde)[0x7f407f9cd33e]
      /usr/lib/mysql/plugin/ha_oqgraph.so(_ZN10ha_oqgraph14index_read_idxEPhjPKhj16ha_rkey_function+0x36b)[0x7f407f9ca36b]
      mysqld(_ZN7handler17ha_index_read_mapEPhPKhm16ha_rkey_function+0x14c)[0x7f408400aebc]
      mysqld(+0x447fd3)[0x7f4083ed0fd3]
      mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x161)[0x7f4083ecdf11]
      mysqld(+0x45c55d)[0x7f4083ee555d]
      mysqld(_ZN4JOIN10exec_innerEv+0xa46)[0x7f4083ef87a6]
      mysqld(_ZN4JOIN4execEv+0x11)[0x7f4083efa581]
      mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x1dd)[0x7f4083ef71ed]
      mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x28d)[0x7f4083efa8dd]
      mysqld(+0x417561)[0x7f4083ea0561]
      mysqld(_Z21mysql_execute_commandP3THD+0x4ba9)[0x7f4083eaabd9]
      mysqld(+0x42379a)[0x7f4083eac79a]
      mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x14df)[0x7f4083eadd5f]
      mysqld(_Z24do_handle_one_connectionP3THD+0x47b)[0x7f4083f718fb]
      mysqld(handle_one_connection+0x47)[0x7f4083f719d7]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x6b50)[0x7f4083651b50]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f4081d5f0ed]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f404bc1f020): is an invalid pointer
      Connection ID (thread ID): 4
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
       

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              • Assignee:
                andymc73 Andrew McDonnell
                Reporter:
                Daniel Gavrila
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                • Created:
                  Updated:
                  Resolved: