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  1. Ignite
  2. IGNITE-11349

MVCC: Deadlock in query pool when executing DML over caches with queryParallism > 1

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Won't Fix
    • None
    • None
    • mvcc, sql

    Description

      Reproducer: CacheMvccSelectForUpdateQueryBasicTest

      There is possible deadlock in QUERY_POOL when running massive SQL updates using queries without reducer when cache.queryParallelism > 1. These updates fire two step queries on each data node and both map and reduce phases are executed in the same QUERY_POOL which can lead to deadlock because reduce phase has blocking operation GridReduceQueryExecutor#awaitAllReplies.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. IGNITE-8596 SQL: remove unnecessary index lookups when query parallelism is enabled

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              rkondakov Roman Kondakov
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                Created:
                Updated:
                Resolved: