Avoid crash due to reading from remote server after disconnect in remote queries during cancellation by azat · Pull Request #89740 · ClickHouse/ClickHouse

azat · 2025-11-07T17:50:26Z

Changelog category (leave one):

Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

Avoid crash due to reading from remote server after disconnect in remote queries during cancellation. Resolves #89468

Details

Previously only sendCancel() was protected against disconnection, but RemoteQueryExecutor may read after sendCancel() and this will lead to NULL pointer dereference:

2025.11.07 14:05:20.159362 [ 73554 ] {b7ebe401-aa59-4306-9663-278657eac110} <Debug> ReadBuffer: ReadBuffer is canceled by the exception: Code: 241. DB::Exception: Query memory tracker: fault injected. Would use 2.00 MiB (attempt to allocate chunk of 1.00 MiB), maximum: 9.31 GiB. (MEMORY_LIMIT_EXCEEDED), Stack trace (when copying this message, always include the lines below):

0. ./ci/tmp/build/./src/Common/Exception.cpp:131: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x0000000013c3c7df
1. DB::Exception::Exception(String&&, int, String, bool) @ 0x000000000c8902ce
2. DB::Exception::Exception(PreformattedMessage&&, int) @ 0x000000000c88fd80
3. ./src/Common/Exception.h:141: DB::Exception::Exception<char const*, char const*, String, String, String>(int, FormatStringHelperImpl<std::type_identity<char const*>::type, std::type_identity<char const*>::type, std::type_identity<String>::type, std::type_identity<String>::type, std::type_identity<String>::type>, char const*&&, char const*&&, String&&, String&&, String&&) @ 0x0000000013cbcc21
4. ./ci/tmp/build/./src/Common/MemoryTracker.cpp:333: MemoryTracker::allocImpl(long, bool, MemoryTracker*, double) @ 0x0000000013cba10e
5. ./ci/tmp/build/./src/Common/MemoryTracker.cpp:476: MemoryTracker::allocImpl(long, bool, MemoryTracker*, double) @ 0x0000000013cb9dc4
6. ./ci/tmp/build/./src/Common/CurrentMemoryTracker.cpp:80: CurrentMemoryTracker::allocImpl(long, bool) @ 0x0000000013c0c079
7. ./src/Common/CurrentMemoryTracker.cpp:103: Allocator<false, false>::realloc(void*, unsigned long, unsigned long, unsigned long) @ 0x0000000013c096c7
8. ./src/Common/PODArray.h:167: void DB::PODArrayBase<1ul, 4096ul, Allocator<false, false>, 0ul, 0ul>::reallocPowerOfTwoElements<>(unsigned long) @ 0x0000000013cc7f0e
9. ./src/Common/PODArray.h:243: DB::CompressedReadBufferBase::readCompressedData(unsigned long&, unsigned long&, bool) @ 0x000000001af881d7
10. ./ci/tmp/build/./src/Compression/CompressedReadBuffer.cpp:10: non-virtual thunk to DB::CompressedReadBuffer::nextImpl() @ 0x000000001af87922
11. ./ci/tmp/build/./src/IO/ReadBuffer.cpp:96: DB::ReadBuffer::next() @ 0x0000000013d245ed
12. ./src/IO/ReadBuffer.h:81: DB::NativeReader::read() @ 0x000000001a4e2e4f
13. ./ci/tmp/build/./src/Client/Connection.cpp:1422: DB::Connection::receiveDataImpl(DB::NativeReader&) @ 0x000000001a2edb59
14. ./ci/tmp/build/./src/Client/Connection.cpp:1434: DB::Connection::receivePacket() @ 0x000000001a2ed154
15. ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:398: DB::MultiplexedConnections::receivePacketUnlocked(std::function<void (int, Poco::Timespan, DB::AsyncEventTimeoutType, String const&, unsigned int)>) @ 0x000000001a335768
16. ./ci/tmp/build/./src/QueryPipeline/RemoteQueryExecutorReadContext.cpp:67: DB::RemoteQueryExecutorReadContext::Task::run(std::function<void (int, Poco::Timespan, DB::AsyncEventTimeoutType, String const&, unsigned int)>, std::function<void ()>) @ 0x000000001779498d
17. ./ci/tmp/build/./src/Common/AsyncTaskExecutor.cpp:89: void boost::context::detail::fiber_entry<boost::context::detail::fiber_record<boost::context::fiber, FiberStack&, Fiber::RoutineImpl<DB::AsyncTaskExecutor::Routine>>>(boost::context::detail::transfer_t) @ 0x0000000017793e83 (version 25.10.1.3832 (official build)) 2025.11.07 14:05:20.159570 [ 28135 ] {} <Debug> ReadBuffer: ReadBuffer is canceled by the exception: Code: 210. DB::NetException: Connection reset by peer, while reading from socket (peer: [::ffff:127.0.0.1]:57678, local: [::ffff:127.0.0.10]:9000). (NETWORK_ERROR), Stack trace (when copying this message, always include the lines below):

0. ./ci/tmp/build/./src/Common/Exception.cpp:131: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x0000000013c3c7df
1. DB::Exception::Exception(String&&, int, String, bool) @ 0x000000000c8902ce
2. ./src/Common/NetException.h:26: DB::NetException::NetException<String, String, String>(int, FormatStringHelperImpl<std::type_identity<String>::type, std::type_identity<String>::type, std::type_identity<String>::type>, String&&, String&&, String&&) @ 0x0000000013e6d433
3. ./ci/tmp/build/./src/IO/ReadBufferFromPocoSocket.cpp:83: DB::ReadBufferFromPocoSocketBase::socketReceiveBytesImpl(char*, unsigned long) @ 0x0000000013e6f17b
4. ./ci/tmp/build/./src/IO/ReadBufferFromPocoSocket.cpp:107: DB::ReadBufferFromPocoSocketBase::nextImpl() @ 0x0000000013e6fa75
5. ./ci/tmp/build/./src/IO/ReadBuffer.cpp:96: DB::ReadBuffer::next() @ 0x0000000013d245ed
6. ./src/IO/ReadBuffer.h:81: DB::TCPHandler::runImpl() @ 0x000000001a46b7b0
7. ./ci/tmp/build/./src/Server/TCPHandler.cpp:2836: DB::TCPHandler::run() @ 0x000000001a48ec99
8. ./ci/tmp/build/./base/poco/Net/src/TCPServerConnection.cpp:40: Poco::Net::TCPServerConnection::start() @ 0x000000001f54aa87
9. ./ci/tmp/build/./base/poco/Net/src/TCPServerDispatcher.cpp:115: Poco::Net::TCPServerDispatcher::run() @ 0x000000001f54af19
10. ./ci/tmp/build/./base/poco/Foundation/src/ThreadPool.cpp:205: Poco::PooledThread::run() @ 0x000000001f5116c7
11. ./base/poco/Foundation/src/Thread_POSIX.cpp:341: Poco::ThreadImpl::runnableEntry(void*) @ 0x000000001f50fac1
12. ? @ 0x0000000000094ac3
13. ? @ 0x00000000001268c0 (version 25.10.1.3832 (official build)) 2025.11.07 14:05:20.159568 [ 63583 ] {b7ebe401-aa59-4306-9663-278657eac110} <Trace> ReadFromParallelRemoteReplicasStep: (127.0.0.10:9000) Cancelling query because enough data has been read

BaseDaemon: Address: 0x8. Access: read. Address not mapped to object.
BaseDaemon: Stack trace: 0x000000001a2ebf7b 0x000000001a335768 0x000000001a33547e 0x000000001777d565 0x000000001a53597a 0x000000001a5300e6 0x000000001a534103 0x0000000013d908eb 0x0000000013d97d66 0x0000000013d8d812 0x0000000013d9549a 0x00007f521e393ac3 0x00007f521e4258c0
BaseDaemon: 2.0. inlined from ./src/IO/VarInt.h:98: DB::readVarUInt(unsigned long&, DB::ReadBuffer&)
BaseDaemon: 2. ./ci/tmp/build/./src/Client/Connection.cpp:1315: DB::Connection::receivePacket() @ 0x000000001a2ebf7b
BaseDaemon: 3. ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:398: DB::MultiplexedConnections::receivePacketUnlocked(std::function<void (int, Poco::Timespan, DB::AsyncEventTimeoutType, String const&, unsigned int)>) @ 0x000000001a335768
BaseDaemon: 4. ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:253: DB::MultiplexedConnections::receivePacket() @ 0x000000001a33547e
BaseDaemon: 5. ./ci/tmp/build/./src/QueryPipeline/RemoteQueryExecutor.cpp:808: DB::RemoteQueryExecutor::finish() @ 0x000000001777d565

So let's simply throw in sendCancel() if the connection was lost.

CI: https://s3.amazonaws.com/clickhouse-test-reports/json.html?PR=89712&sha=9eebfa48a4c58a959ae9b57f3fa6e6eaa5bac61e&name_0=PR

…uring cancellation Previously only sendCancel() was protected against disconnection, but RemoteQueryExecutor may read after sendCancel() and this will lead to NULL pointer dereference: 2025.11.07 14:05:20.159362 [ 73554 ] {b7ebe401-aa59-4306-9663-278657eac110} <Debug> ReadBuffer: ReadBuffer is canceled by the exception: Code: 241. DB::Exception: Query memory tracker: fault injected. Would use 2.00 MiB (attempt to allocate chunk of 1.00 MiB), maximum: 9.31 GiB. (MEMORY_LIMIT_EXCEEDED), Stack trace (when copying this message, always include the lines below): 0. ./ci/tmp/build/./src/Common/Exception.cpp:131: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x0000000013c3c7df 1. DB::Exception::Exception(String&&, int, String, bool) @ 0x000000000c8902ce 2. DB::Exception::Exception(PreformattedMessage&&, int) @ 0x000000000c88fd80 3. ./src/Common/Exception.h:141: DB::Exception::Exception<char const*, char const*, String, String, String>(int, FormatStringHelperImpl<std::type_identity<char const*>::type, std::type_identity<char const*>::type, std::type_identity<String>::type, std::type_identity<String>::type, std::type_identity<String>::type>, char const*&&, char const*&&, String&&, String&&, String&&) @ 0x0000000013cbcc21 4. ./ci/tmp/build/./src/Common/MemoryTracker.cpp:333: MemoryTracker::allocImpl(long, bool, MemoryTracker*, double) @ 0x0000000013cba10e 5. ./ci/tmp/build/./src/Common/MemoryTracker.cpp:476: MemoryTracker::allocImpl(long, bool, MemoryTracker*, double) @ 0x0000000013cb9dc4 6. ./ci/tmp/build/./src/Common/CurrentMemoryTracker.cpp:80: CurrentMemoryTracker::allocImpl(long, bool) @ 0x0000000013c0c079 7. ./src/Common/CurrentMemoryTracker.cpp:103: Allocator<false, false>::realloc(void*, unsigned long, unsigned long, unsigned long) @ 0x0000000013c096c7 8. ./src/Common/PODArray.h:167: void DB::PODArrayBase<1ul, 4096ul, Allocator<false, false>, 0ul, 0ul>::reallocPowerOfTwoElements<>(unsigned long) @ 0x0000000013cc7f0e 9. ./src/Common/PODArray.h:243: DB::CompressedReadBufferBase::readCompressedData(unsigned long&, unsigned long&, bool) @ 0x000000001af881d7 10. ./ci/tmp/build/./src/Compression/CompressedReadBuffer.cpp:10: non-virtual thunk to DB::CompressedReadBuffer::nextImpl() @ 0x000000001af87922 11. ./ci/tmp/build/./src/IO/ReadBuffer.cpp:96: DB::ReadBuffer::next() @ 0x0000000013d245ed 12. ./src/IO/ReadBuffer.h:81: DB::NativeReader::read() @ 0x000000001a4e2e4f 13. ./ci/tmp/build/./src/Client/Connection.cpp:1422: DB::Connection::receiveDataImpl(DB::NativeReader&) @ 0x000000001a2edb59 14. ./ci/tmp/build/./src/Client/Connection.cpp:1434: DB::Connection::receivePacket() @ 0x000000001a2ed154 15. ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:398: DB::MultiplexedConnections::receivePacketUnlocked(std::function<void (int, Poco::Timespan, DB::AsyncEventTimeoutType, String const&, unsigned int)>) @ 0x000000001a335768 16. ./ci/tmp/build/./src/QueryPipeline/RemoteQueryExecutorReadContext.cpp:67: DB::RemoteQueryExecutorReadContext::Task::run(std::function<void (int, Poco::Timespan, DB::AsyncEventTimeoutType, String const&, unsigned int)>, std::function<void ()>) @ 0x000000001779498d 17. ./ci/tmp/build/./src/Common/AsyncTaskExecutor.cpp:89: void boost::context::detail::fiber_entry<boost::context::detail::fiber_record<boost::context::fiber, FiberStack&, Fiber::RoutineImpl<DB::AsyncTaskExecutor::Routine>>>(boost::context::detail::transfer_t) @ 0x0000000017793e83 (version 25.10.1.3832 (official build)) 2025.11.07 14:05:20.159570 [ 28135 ] {} <Debug> ReadBuffer: ReadBuffer is canceled by the exception: Code: 210. DB::NetException: Connection reset by peer, while reading from socket (peer: [::ffff:127.0.0.1]:57678, local: [::ffff:127.0.0.10]:9000). (NETWORK_ERROR), Stack trace (when copying this message, always include the lines below): 0. ./ci/tmp/build/./src/Common/Exception.cpp:131: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x0000000013c3c7df 1. DB::Exception::Exception(String&&, int, String, bool) @ 0x000000000c8902ce 2. ./src/Common/NetException.h:26: DB::NetException::NetException<String, String, String>(int, FormatStringHelperImpl<std::type_identity<String>::type, std::type_identity<String>::type, std::type_identity<String>::type>, String&&, String&&, String&&) @ 0x0000000013e6d433 3. ./ci/tmp/build/./src/IO/ReadBufferFromPocoSocket.cpp:83: DB::ReadBufferFromPocoSocketBase::socketReceiveBytesImpl(char*, unsigned long) @ 0x0000000013e6f17b 4. ./ci/tmp/build/./src/IO/ReadBufferFromPocoSocket.cpp:107: DB::ReadBufferFromPocoSocketBase::nextImpl() @ 0x0000000013e6fa75 5. ./ci/tmp/build/./src/IO/ReadBuffer.cpp:96: DB::ReadBuffer::next() @ 0x0000000013d245ed 6. ./src/IO/ReadBuffer.h:81: DB::TCPHandler::runImpl() @ 0x000000001a46b7b0 7. ./ci/tmp/build/./src/Server/TCPHandler.cpp:2836: DB::TCPHandler::run() @ 0x000000001a48ec99 8. ./ci/tmp/build/./base/poco/Net/src/TCPServerConnection.cpp:40: Poco::Net::TCPServerConnection::start() @ 0x000000001f54aa87 9. ./ci/tmp/build/./base/poco/Net/src/TCPServerDispatcher.cpp:115: Poco::Net::TCPServerDispatcher::run() @ 0x000000001f54af19 10. ./ci/tmp/build/./base/poco/Foundation/src/ThreadPool.cpp:205: Poco::PooledThread::run() @ 0x000000001f5116c7 11. ./base/poco/Foundation/src/Thread_POSIX.cpp:341: Poco::ThreadImpl::runnableEntry(void*) @ 0x000000001f50fac1 12. ? @ 0x0000000000094ac3 13. ? @ 0x00000000001268c0 (version 25.10.1.3832 (official build)) 2025.11.07 14:05:20.159568 [ 63583 ] {b7ebe401-aa59-4306-9663-278657eac110} <Trace> ReadFromParallelRemoteReplicasStep: (127.0.0.10:9000) Cancelling query because enough data has been read BaseDaemon: Address: 0x8. Access: read. Address not mapped to object. BaseDaemon: Stack trace: 0x000000001a2ebf7b 0x000000001a335768 0x000000001a33547e 0x000000001777d565 0x000000001a53597a 0x000000001a5300e6 0x000000001a534103 0x0000000013d908eb 0x0000000013d97d66 0x0000000013d8d812 0x0000000013d9549a 0x00007f521e393ac3 0x00007f521e4258c0 BaseDaemon: 2.0. inlined from ./src/IO/VarInt.h:98: DB::readVarUInt(unsigned long&, DB::ReadBuffer&) BaseDaemon: 2. ./ci/tmp/build/./src/Client/Connection.cpp:1315: DB::Connection::receivePacket() @ 0x000000001a2ebf7b BaseDaemon: 3. ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:398: DB::MultiplexedConnections::receivePacketUnlocked(std::function<void (int, Poco::Timespan, DB::AsyncEventTimeoutType, String const&, unsigned int)>) @ 0x000000001a335768 BaseDaemon: 4. ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:253: DB::MultiplexedConnections::receivePacket() @ 0x000000001a33547e BaseDaemon: 5. ./ci/tmp/build/./src/QueryPipeline/RemoteQueryExecutor.cpp:808: DB::RemoteQueryExecutor::finish() @ 0x000000001777d565 So let's simply throw in sendCancel() if the connection was lost

clickhouse-gh · 2025-11-07T17:50:57Z

Workflow [PR], commit [0d8387c]

Summary: ❌

job_name	test_name	status	info
Integration tests (amd_asan, old analyzer, 3/6)		failure
	test_s3_access_headers/test.py::test_custom_access_header[test_access_over_custom_header]	FAIL	cidb
Integration tests (amd_binary, 5/5)		failure
	test_s3_access_headers/test.py::test_custom_access_header[test_access_over_custom_header]	FAIL	cidb
Integration tests (arm_binary, distributed plan, 4/4)		failure
	test_s3_access_headers/test.py::test_custom_access_header[test_access_over_custom_header]	FAIL	cidb
Integration tests (amd_tsan, 3/6)		failure
	test_s3_access_headers/test.py::test_custom_access_header[test_access_over_custom_header]	FAIL	cidb
Integration tests (amd_tsan, 5/6)		failure
	test_storage_nats/test_nats_core.py::test_nats_no_connection_at_startup_2	FAIL	cidb
AST fuzzer (amd_ubsan)		failure
	Logical error: 'Expected reading a single granule with 1384 rows, requested 3616 rows in Compact part in bucket 0'.	FAIL	cidb
Finish Workflow		failure
	python3 ./ci/jobs/scripts/workflow_hooks/new_tests_check.py	failure

azat · 2025-11-10T12:32:23Z

CI:

test_s3_access_headers - unrelated and already fixed
test_storage_nats - flaky
Logical error: Expected reading a single granule with X rows, requested Y rows in Compact part in bucket Z #89805

Cherry pick #89740 to 25.8: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

…r after disconnect in remote queries during cancellation

Cherry pick #89740 to 25.9: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

…r after disconnect in remote queries during cancellation

Cherry pick #89740 to 25.10: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

…er after disconnect in remote queries during cancellation

Backport #89740 to 25.10: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

Backport #89740 to 25.8: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

Backport #89740 to 25.9: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

rienath · 2025-12-08T10:30:58Z

Sorry, I thought I was typing in console

The race condition causes a crash when reading from a disconnected connection in distributed queries. The `in` buffer: ``` (gdb) frame 1 (gdb) print this->in $19 = {__ptr_ = 0x0, __cntrl_ = 0x0} (gdb) print this->connected $18 = false ``` But the same time: ``` (gdb) frame 2 async_callback=...) at ./ci/tmp/build/./src/Client/MultiplexedConnections.cpp:398 (gdb) print this->sent_query $15 = true (gdb) print this->cancelled $16 = false (gdb) print this->active_connection_count $17 = 1 ``` Current solution will not fix the issue, it just apply a check like in `sendCancel()`. Related PRs: - ClickHouse#89740 - ClickHouse#92807 - ClickHouse#93029

clickhouse-gh bot added the pr-bugfix Pull request with bugfix, not backported by default label Nov 7, 2025

azat requested a review from shankar-iyer November 7, 2025 17:53

shankar-iyer approved these changes Nov 9, 2025

View reviewed changes

bharatnc assigned shankar-iyer Nov 9, 2025

azat added this pull request to the merge queue Nov 10, 2025

Merged via the queue into ClickHouse:master with commit afc4cac Nov 10, 2025
123 of 131 checks passed

azat deleted the dist-fix-cancel branch November 10, 2025 12:47

robot-ch-test-poll3 added the pr-synced-to-cloud The PR is synced to the cloud repo label Nov 10, 2025

rienath added v25.8-must-backport v25.9-must-backport v25.10-must-backport labels Nov 24, 2025

robot-clickhouse added the pr-must-backport-synced The `*-must-backport` labels are synced into the cloud Sync PR label Nov 24, 2025

robot-ch-test-poll4 mentioned this pull request Nov 24, 2025

Cherry pick #89740 to 25.8: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation #90734

Merged

robot-ch-test-poll4 added a commit that referenced this pull request Nov 24, 2025

Merge pull request #90734 from ClickHouse/cherrypick/25.8/89740

1ef3da3

Cherry pick #89740 to 25.8: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

robot-clickhouse added a commit that referenced this pull request Nov 24, 2025

Backport #89740 to 25.8: Avoid crash due to reading from remote serve…

fbb1b43

…r after disconnect in remote queries during cancellation

robot-ch-test-poll4 added a commit that referenced this pull request Nov 24, 2025

Merge pull request #90736 from ClickHouse/cherrypick/25.9/89740

71d5a7f

Cherry pick #89740 to 25.9: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

robot-clickhouse added a commit that referenced this pull request Nov 24, 2025

Backport #89740 to 25.9: Avoid crash due to reading from remote serve…

ae035ef

…r after disconnect in remote queries during cancellation

robot-ch-test-poll4 added a commit that referenced this pull request Nov 24, 2025

Merge pull request #90738 from ClickHouse/cherrypick/25.10/89740

801b969

Cherry pick #89740 to 25.10: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

robot-clickhouse added a commit that referenced this pull request Nov 24, 2025

Backport #89740 to 25.10: Avoid crash due to reading from remote serv…

5acc882

…er after disconnect in remote queries during cancellation

robot-ch-test-poll4 mentioned this pull request Nov 24, 2025

Backport #89740 to 25.10: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation #90739

Merged

robot-ch-test-poll1 added the pr-backports-created Backport PRs are successfully created, it won't be processed by CI script anymore label Nov 24, 2025

clickhouse-gh bot added a commit that referenced this pull request Nov 24, 2025

Merge pull request #90739 from ClickHouse/backport/25.10/89740

6cc6bcc

Backport #89740 to 25.10: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

rienath added a commit that referenced this pull request Nov 25, 2025

Merge pull request #90735 from ClickHouse/backport/25.8/89740

97c39ff

Backport #89740 to 25.8: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

rienath added a commit that referenced this pull request Nov 25, 2025

Merge pull request #90737 from ClickHouse/backport/25.9/89740

ff2a196

Backport #89740 to 25.9: Avoid crash due to reading from remote server after disconnect in remote queries during cancellation

rienath assigned rienath and shankar-iyer and unassigned shankar-iyer and rienath Dec 8, 2025

rienath mentioned this pull request Dec 22, 2025

Fix crash when receiving from disconnected Connection #92807

Merged

AVMusorin mentioned this pull request Jan 28, 2026

Avoid possible crash for distributed queries in case of cancellation #95466

Merged

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Avoid crash due to reading from remote server after disconnect in remote queries during cancellation#89740

Avoid crash due to reading from remote server after disconnect in remote queries during cancellation#89740
azat merged 1 commit intoClickHouse:masterfrom
azat:dist-fix-cancel

azat commented Nov 7, 2025 •

edited by clickhouse-gh bot

Loading

Uh oh!

clickhouse-gh bot commented Nov 7, 2025 •

edited

Loading

Uh oh!

azat commented Nov 10, 2025

Uh oh!

Uh oh!

rienath commented Dec 8, 2025

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

Conversation

azat commented Nov 7, 2025 • edited by clickhouse-gh bot Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Changelog category (leave one):

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

Details

Uh oh!

clickhouse-gh bot commented Nov 7, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

azat commented Nov 10, 2025

Uh oh!

Uh oh!

rienath commented Dec 8, 2025

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

azat commented Nov 7, 2025 •

edited by clickhouse-gh bot

Loading

clickhouse-gh bot commented Nov 7, 2025 •

edited

Loading