From bb8c3e59e73c639863b6ef140cc19492c802e9c1 Mon Sep 17 00:00:00 2001 From: yi-xmu Date: Thu, 18 Dec 2025 11:23:27 +0800 Subject: [PATCH 1/2] Revert "Range read block range lock if RW conflict (#180)" This reverts commit 3e820a67bd5e9a115f22af3709ac8ac6fad57f6a. --- data_substrate | 2 +- .../r/range_read_block_on_write_lock.result | 4157 ----------------- .../r/range_split_deadlock_abort.result | 26 - .../t/range_read_block_on_write_lock.opt | 1 - .../t/range_read_block_on_write_lock.test | 148 - .../t/range_split_deadlock_abort.opt | 1 - .../t/range_split_deadlock_abort.test | 73 - 7 files changed, 1 insertion(+), 4407 deletions(-) delete mode 100644 storage/eloq/mysql-test/mono_basic/r/range_read_block_on_write_lock.result delete mode 100644 storage/eloq/mysql-test/mono_basic/r/range_split_deadlock_abort.result delete mode 100644 storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.opt delete mode 100644 storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.test delete mode 100644 storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.opt delete mode 100644 storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.test diff --git a/data_substrate b/data_substrate index 7c0a42621ce..0ee68ce2451 160000 --- a/data_substrate +++ b/data_substrate @@ -1 +1 @@ -Subproject commit 7c0a42621ceaae1283ae0a8a531796b49c547a3a +Subproject commit 0ee68ce2451e4a0f6a46b37f1d289038279ef4be diff --git a/storage/eloq/mysql-test/mono_basic/r/range_read_block_on_write_lock.result b/storage/eloq/mysql-test/mono_basic/r/range_read_block_on_write_lock.result deleted file mode 100644 index fbad715119e..00000000000 --- a/storage/eloq/mysql-test/mono_basic/r/range_read_block_on_write_lock.result +++ /dev/null @@ -1,4157 +0,0 @@ -set @@default_storage_engine= eloq; -DROP TABLE IF EXISTS t1; -# Test: Range reads SHOULD block when range split holds write lock -# When range split holds write lock (Phase 2-3), reads should block -# because write locks are exclusive and incompatible with read locks. -create table t1 (c0 int auto_increment, c1 char(250), c2 char(250), c3 char(250), c4 int, primary key(c0)); -insert into t1 values (0,'initial', 'data', 'row', 1); -SET SESSION debug_dbug="+d,eloq;term_SplitFlushOp_CommitAcquireAllWriteOp_Continue;node_id=-1"; -SET SESSION debug_dbug="+d,eloq;at_once;node_id=-1;action=NOTIFY_CHECKPOINTER"; -connect conn_read1,localhost,root,,test,$MONO1_PORT; -connect conn_read2,localhost,root,,test,$MONO1_PORT; -connect conn_read3,localhost,root,,test,$MONO1_PORT; -# Test Case 1: Single read should BLOCK (not complete immediately) -connection conn_read1; -begin; -select count(*) from t1;; -connection default; -# Test Case 2: Multiple concurrent reads should all BLOCK -connection conn_read2; -begin; -select count(*) from t1 where c4 = 1;; -connection conn_read3; -begin; -select c0, c1, c2 from t1 order by c0;; -connection default; -# Printing processlist before verification: -# Test Case 3: Complete the range split (releases write lock) -SET SESSION debug_dbug="-d,eloq;term_SplitFlushOp_CommitAcquireAllWriteOp_Continue;node_id=-1"; -# Test Case 4: Verify blocked reads complete after write lock is released -connection conn_read1; -count(*) -2048 -select count(*) from t1; -count(*) -2048 -commit; -connection conn_read2; -count(*) -2048 -select count(*) from t1 where c4 = 1; -count(*) -2048 -commit; -connection conn_read3; -c0 c1 c2 -1 initial data -2 initial data -3 initial data -4 initial data -6 initial data -7 initial data -8 initial data -9 initial data -13 initial data -14 initial data -15 initial data -16 initial data -17 initial data -18 initial data -19 initial data -20 initial data -28 initial data -29 initial data -30 initial data -31 initial data -32 initial data -33 initial data -34 initial data -35 initial data -36 initial data -37 initial data -38 initial data -39 initial data -40 initial data -41 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verification: -# Test Case 6: Verify reads completed successfully and range split completed -connection conn_read1; -select count(*) from t1; -count(*) -2048 -disconnect conn_read1; -disconnect conn_read2; -disconnect conn_read3; -connection default; -drop table t1; diff --git a/storage/eloq/mysql-test/mono_basic/r/range_split_deadlock_abort.result b/storage/eloq/mysql-test/mono_basic/r/range_split_deadlock_abort.result deleted file mode 100644 index 3663f0f3091..00000000000 --- a/storage/eloq/mysql-test/mono_basic/r/range_split_deadlock_abort.result +++ /dev/null @@ -1,26 +0,0 @@ -set @@default_storage_engine= eloq; -DROP TABLE IF EXISTS t1; -# Test: Range split SHOULD downgrade lock and retry at phase 8 when deadlock detected -# When range split is at phase 8 and deadlock is detected, it should -# downgrade write intent lock and retry phase 8 instead of fully aborting. -# -# This test uses the split_flush_commit_acquire_all_deadlock fault injector -# to simulate a deadlock at phase 8, which triggers the downgrade and retry logic. -create table t1 (c0 int auto_increment, c1 char(250), c2 char(250), c3 char(250), c4 int, primary key(c0)); -insert into t1 values (0,'initial', 'data', 'row', 1); -SET SESSION debug_dbug="+d,eloq;split_flush_commit_acquire_all_deadlock;node_id=-1"; -# Step 2: Trigger range split with checkpoint -# Range split will progress through phases 1-7, and at phase 8: -# - The fault injector will inject DEAD_LOCK_ABORT error -# - IsDeadlock() will return true -# - Range split will downgrade write intent lock via PostWriteType::DowngradeLock -# - Range split will retry phase 8 after downgrade -SET SESSION debug_dbug="+d,eloq;at_once;node_id=-1;action=NOTIFY_CHECKPOINTER"; -# Step 3: Verify range split completed successfully -connection default; -select count(*) from t1; -count(*) -2048 -# Step 4: Verify no queries are still blocked -connection default; -drop table t1; diff --git a/storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.opt b/storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.opt deleted file mode 100644 index a62d1fea474..00000000000 --- a/storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.opt +++ /dev/null @@ -1 +0,0 @@ ---checkpointer_interval=86400 diff --git a/storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.test b/storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.test deleted file mode 100644 index 6c704a5fb6b..00000000000 --- a/storage/eloq/mysql-test/mono_basic/t/range_read_block_on_write_lock.test +++ /dev/null @@ -1,148 +0,0 @@ ---source include/have_eloq.inc -set @@default_storage_engine= eloq; - ---disable_warnings -DROP TABLE IF EXISTS t1; ---enable_warnings - ---echo # Test: Range reads SHOULD block when range split holds write lock ---echo # When range split holds write lock (Phase 2-3), reads should block ---echo # because write locks are exclusive and incompatible with read locks. - -create table t1 (c0 int auto_increment, c1 char(250), c2 char(250), c3 char(250), c4 int, primary key(c0)); - -# Insert initial data -insert into t1 values (0,'initial', 'data', 'row', 1); - -# Set debug point to pause range split at prepare phase (Phase 2-3) -# This must be set BEFORE building up data, so when the split is triggered, -# it will pause at the prepare phase where write lock is held -SET SESSION debug_dbug="+d,eloq;term_SplitFlushOp_CommitAcquireAllWriteOp_Continue;node_id=-1"; - -# Build up enough data to trigger range split -# We need to exceed range_max_size (1MB for testing builds, 256MB otherwise) -# Using the same pattern as range_split_write_forward.test: double the data each time -# 11 iterations: 1 -> 2 -> 4 -> 8 -> 16 -> 32 -> 64 -> 128 -> 256 -> 512 -> 1024 -> 2048 rows -# With char(250) columns, this should exceed the threshold -let $counter= 11; ---disable_result_log ---disable_query_log -while($counter) -{ - insert into t1 (c1, c2, c3, c4) select c1, c2, c3, c4 from t1; - dec $counter; -} ---enable_query_log ---enable_result_log - -# Trigger checkpoint to calculate range size and trigger range split if threshold exceeded -# The range split will pause at prepare phase (write lock held) due to the debug point set above -SET SESSION debug_dbug="+d,eloq;at_once;node_id=-1;action=NOTIFY_CHECKPOINTER"; -# Wait longer for checkpoint to process and range split to start and pause ---sleep 5 - -# Create connections: multiple for concurrent reads ---connect (conn_read1,localhost,root,,test,$MONO1_PORT) ---connect (conn_read2,localhost,root,,test,$MONO1_PORT) ---connect (conn_read3,localhost,root,,test,$MONO1_PORT) - -# Wait a bit more to ensure range split has started and paused at prepare phase ---sleep 2 - ---echo # Test Case 1: Single read should BLOCK (not complete immediately) ---connection conn_read1 -begin; ---send select count(*) from t1; - -# Wait a bit to ensure the read is blocked ---sleep 2 - -# Verify the read is blocked (check processlist) -# Note: Blocked queries are identified by state and info columns -# We check for connections that have: -# 1. Lock-related state (state like "%lock%") -# 2. Matching query info (info like "select count(*) from t1%") -# 3. NULL info with time >= 1 (waiting/blocked) ---connection default -let $wait_condition= - select count(*) >= 1 from information_schema.processlist - where (state like "%lock%" or info like "select count(*) from t1%") - and id != CONNECTION_ID(); ---source include/wait_condition.inc - ---echo # Test Case 2: Multiple concurrent reads should all BLOCK ---connection conn_read2 -begin; ---send select count(*) from t1 where c4 = 1; - ---connection conn_read3 -begin; ---send select c0, c1, c2 from t1 order by c0; - -# Wait a bit to ensure reads are blocked ---sleep 10 - -# Verify all reads are blocked -# Note: Blocked queries are identified by state and info columns -# We check for connections that have: -# 1. Lock-related state (state like "%lock%") -# 2. Matching query info (info like "select count(*) from t1%" or "select c0, c1, c2 from t1%") -# 3. NULL info with time >= 1 (waiting/blocked) ---connection default ---echo # Printing processlist before verification: -let $wait_condition= - select count(*) >= 3 from information_schema.processlist - where (state like "%lock%" or - info like "select count(*) from t1%" or - info like "select c0, c1, c2 from t1%") - and id != CONNECTION_ID(); ---source include/wait_condition.inc - ---echo # Test Case 3: Complete the range split (releases write lock) -# Complete the range split by removing the debug point and triggering checkpoint -# This will allow the split to proceed through all phases and release the write lock -SET SESSION debug_dbug="-d,eloq;term_SplitFlushOp_CommitAcquireAllWriteOp_Continue;node_id=-1"; -# SET SESSION debug_dbug="+d,eloq;at_once;node_id=-1;action=NOTIFY_CHECKPOINTER"; ---sleep 5 - ---echo # Test Case 4: Verify blocked reads complete after write lock is released -# All reads should now complete successfully after the range split releases the write lock ---connection conn_read1 ---reap -select count(*) from t1; -commit; - ---connection conn_read2 ---reap -select count(*) from t1 where c4 = 1; -commit; - ---connection conn_read3 ---reap -select c0, c1, c2 from t1; -commit; - ---echo # Test Case 5: Verify no queries are still blocked ---connection default -# After reaping, queries should be completed -# We verify by checking that there are no blocked queries (identified by state and info columns) ---echo # Printing processlist before verification: -let $wait_condition= - select count(*) = 0 from information_schema.processlist - where ((state like "%lock%") or - (info IS NULL and time >= 1)) - and (info like "select%from t1%" or info IS NULL); ---source include/wait_condition.inc - ---echo # Test Case 6: Verify reads completed successfully and range split completed ---connection conn_read1 -select count(*) from t1; - -# Cleanup ---disconnect conn_read1 ---disconnect conn_read2 ---disconnect conn_read3 - ---connection default -drop table t1; - diff --git a/storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.opt b/storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.opt deleted file mode 100644 index a62d1fea474..00000000000 --- a/storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.opt +++ /dev/null @@ -1 +0,0 @@ ---checkpointer_interval=86400 diff --git a/storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.test b/storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.test deleted file mode 100644 index 1b0a4d89777..00000000000 --- a/storage/eloq/mysql-test/mono_basic/t/range_split_deadlock_abort.test +++ /dev/null @@ -1,73 +0,0 @@ ---source include/have_eloq.inc -set @@default_storage_engine= eloq; - ---disable_warnings -DROP TABLE IF EXISTS t1; ---enable_warnings - ---echo # Test: Range split SHOULD downgrade lock and retry at phase 8 when deadlock detected ---echo # When range split is at phase 8 and deadlock is detected, it should ---echo # downgrade write intent lock and retry phase 8 instead of fully aborting. ---echo # ---echo # This test uses the split_flush_commit_acquire_all_deadlock fault injector ---echo # to simulate a deadlock at phase 8, which triggers the downgrade and retry logic. - -create table t1 (c0 int auto_increment, c1 char(250), c2 char(250), c3 char(250), c4 int, primary key(c0)); - -# Insert initial data -insert into t1 values (0,'initial', 'data', 'row', 1); - -# Step 1: Enable fault injector to simulate deadlock at phase 8 -# This fault injector will inject a DEAD_LOCK_ABORT error when range split -# reaches phase 8 (Commit Acquire All Write Lock), which will trigger the -# downgrade and retry logic -SET SESSION debug_dbug="+d,eloq;split_flush_commit_acquire_all_deadlock;node_id=-1"; - -# Build up enough data in t1 to trigger range split -# We need to exceed range_max_size (1MB for testing builds, 256MB otherwise) -# Using the same pattern as range_read_block_on_write_lock.test: double the data each time -# 11 iterations: 1 -> 2 -> 4 -> 8 -> 16 -> 32 -> 64 -> 128 -> 256 -> 512 -> 1024 -> 2048 rows -# With char(250) columns, this should exceed the threshold -let $counter= 11; ---disable_result_log ---disable_query_log -while($counter) -{ - insert into t1 select * from t1; - dec $counter; -} ---enable_query_log ---enable_result_log - ---echo # Step 2: Trigger range split with checkpoint ---echo # Range split will progress through phases 1-7, and at phase 8: ---echo # - The fault injector will inject DEAD_LOCK_ABORT error ---echo # - IsDeadlock() will return true ---echo # - Range split will downgrade write intent lock via PostWriteType::DowngradeLock ---echo # - Range split will retry phase 8 after downgrade -SET SESSION debug_dbug="+d,eloq;at_once;node_id=-1;action=NOTIFY_CHECKPOINTER"; - -# Wait for checkpoint to process and range split to start ---sleep 5 - -# Wait for range split to reach phase 8, trigger fault injector, downgrade, and retry ---sleep 10 - ---echo # Step 3: Verify range split completed successfully ---connection default -# Verify range split completed by checking that data is accessible -# If range split failed, we would see errors or the split wouldn't complete -select count(*) from t1; - ---echo # Step 4: Verify no queries are still blocked ---connection default -# After range split completes, there should be no blocked queries -let $wait_condition= - select count(*) = 0 from information_schema.processlist - where ((state like "%lock%") or - (info IS NULL and time >= 1)) - and (info like "select%from t1%" or info IS NULL); ---source include/wait_condition.inc - -# Cleanup -drop table t1; From 5a8c57004682ddf08a6c564d45258bb211c316dc Mon Sep 17 00:00:00 2001 From: yi-xmu Date: Thu, 18 Dec 2025 11:24:10 +0800 Subject: [PATCH 2/2] update submodule --- data_substrate | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/data_substrate b/data_substrate index 0ee68ce2451..f74a44e7321 160000 --- a/data_substrate +++ b/data_substrate @@ -1 +1 @@ -Subproject commit 0ee68ce2451e4a0f6a46b37f1d289038279ef4be +Subproject commit f74a44e73215a180839a0d0b01114a3e991d5c2c