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Fix possible "Can't attach query to the thread, it is already attached"

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After detachQueryIfNotDetached() had been removed it is not enough to
use attachTo() for ThreadPool (scheduleOrThrowOnError()) since the query
may be already attached, if the thread doing multiple jobs, so
CurrentThread::attachToIfDetached() should be used instead.

This should fix all the places from the failures on CI [1]:

    $ fgrep DB::CurrentThread::attachTo -A1 ~/Downloads/47.txt  | fgrep -v attachTo | cut -d' ' -f5,6 | sort | uniq -c
         92 --
          2 /fasttest-workspace/build/../../ClickHouse/contrib/libcxx/include/deque:1393: DB::ParallelParsingInputFormat::parserThreadFunction(std::__1::shared_ptr<DB::ThreadGroupStatus>,
          4 /fasttest-workspace/build/../../ClickHouse/src/Storages/MergeTree/MergeTreeData.cpp:1595: void
         87 /fasttest-workspace/build/../../ClickHouse/src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp:993: void

  [1]: https://github.com/ClickHouse/ClickHouse/runs/4954466034?check_suite_focus=true

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
This commit is contained in:
Azat Khuzhin 2022-01-27 11:55:38 +03:00
parent b0c862c297
commit 1519985c98
3 changed files with 3 additions and 3 deletions
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2
src/Processors/Formats/Impl/ParallelParsingInputFormat.cpp
View File

@ -55,7 +55,7 @@ void ParallelParsingInputFormat::segmentatorThreadFunction(ThreadGroupStatusPtr
void ParallelParsingInputFormat::parserThreadFunction(ThreadGroupStatusPtr thread_group, size_t current_ticket_number)
{
if (thread_group)
CurrentThread::attachTo(thread_group);
CurrentThread::attachToIfDetached(thread_group);
const auto parser_unit_number = current_ticket_number % processing_units.size();
auto & unit = processing_units[parser_unit_number];

2
src/Storages/MergeTree/MergeTreeData.cpp
View File

@ -1590,7 +1590,7 @@ void MergeTreeData::clearPartsFromFilesystem(const DataPartsVector & parts_to_re
pool.scheduleOrThrowOnError([&, thread_group = CurrentThread::getGroup()]
{
if (thread_group)
CurrentThread::attachTo(thread_group);
CurrentThread::attachToIfDetached(thread_group);
LOG_DEBUG(log, "Removing part from filesystem {}", part->name);
part->remove();

2
src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp
View File

@ -988,7 +988,7 @@ RangesInDataParts MergeTreeDataSelectExecutor::filterPartsByPrimaryKeyAndSkipInd
pool.scheduleOrThrowOnError([&, part_index, thread_group = CurrentThread::getGroup()]
{
if (thread_group)
CurrentThread::attachTo(thread_group);
CurrentThread::attachToIfDetached(thread_group);
process_part(part_index);
});