Fix PS-4328, a crash that occurs when out of locks #443
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tokuft test version. rename tokuft test version to avoid conflict.
…parameter instead.
… permissions were changed in commit 5aca29f.
bug when the lock memory use is over the limit. The ydb tests show that DB->put normally returns TOKUDB_OUT_OF_LOCKS when the lock memory use is over the limit.
retry occurs and the lock memory use is over the limit, then pending lock requests should be completed with TOKUDB_OUT_OF_LOCKS result. The current code does not handle this case and crashes. This commit fixes this case and is sufficient to fix PS-4328.
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PS-4328 describes a crash in the FT locktree that is caused when the memory
used for locks exceeds the locktree limit AND pending lock requests are
retried. The lock request retry logic did not handle this case and crashed.
This pull request:
Contains locktree test cases that expose this problem.
Contains ydb test cases that expose this problem. These test cases shows
that DB->put can return the TOKUDB_OUT_OF_LOCKS error when the locktree
memory exceeds its limit. This is a normal case.
Contains a bug fix in the lock request retry logic that correctly handles
the TOKUDB_OUT_OF_LOCKS error by terminating the pending lock request with
the TOKUDB_OUT_OF_LOCKS error. The application logic using the FT library
SHOULD handle this error.
Tools:
Ubuntu 19.10, Clang 7,8,9, Gcc 7,8,9, Cmake 3.14
Copyright (c) 2020, Rik Prohaska
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