Add fail point pause_after_copr_streams_acquired_once

[Lloyd-Pottiger]

What problem does this PR solve?

Issue Number: close #4868

Problem Summary:

What is changed and how it works?

Add fail point pause_after_copr_streams_acquired_once which is the same as pause_after_copr_streams_acquired but only fail once.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• JaySon-Huang
• SeaRise

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[jiaqizho]

@SeaRise
@Lloyd-Pottiger added a pause_after_copr_streams_acquired_once to pause one of query thread. This will help the storage layer to generate a very long stale snapshot. is that make sense to you ?

Diff with pause_after_copr_streams_acquired, pause_after_copr_streams_acquired will pause channel of query, but pause_after_copr_streams_acquired_once will pause once.

[Lloyd-Pottiger]

/run-all-tests

[JaySon-Huang]

LGTM

[JaySon-Huang]

/merge

[ti-chi-bot]

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: bb29911

[ti-chi-bot]

@Lloyd-Pottiger: Your PR was out of date, I have automatically updated it for you.

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[sre-bot]

Coverage for changed files

Filename                                        Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Common/FailPoint.cpp                                440                98    77.73%           6                 0   100.00%          56                 8    85.71%         146                61    58.22%
Flash/Coprocessor/DAGStorageInterpreter.cpp         424               424     0.00%          32                32     0.00%         866               866     0.00%         282               282     0.00%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                               864               522    39.58%          38                32    15.79%         922               874     5.21%         428               343    19.86%

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18152      9816             45.92%    202640  98283        51.50%

full coverage report (for internal network access only)

[sre-bot]

Coverage for changed files

Filename                                        Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Common/FailPoint.cpp                                440                98    77.73%           6                 0   100.00%          56                 8    85.71%         146                61    58.22%
Flash/Coprocessor/DAGStorageInterpreter.cpp         424               424     0.00%          32                32     0.00%         866               866     0.00%         282               282     0.00%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                               864               522    39.58%          38                32    15.79%         922               874     5.21%         428               343    19.86%

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18083      9836             45.61%    201542  98193        51.28%

full coverage report (for internal network access only)