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[BugFix] should acquire db lock out of createLoadTask to avoid dead lock #55219

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merged 3 commits into from
Jan 20, 2025
+18 −37
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[BugFix] should acquire db lock out of createLoadTask to avoid dead lock #55219

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5894e06
[BugFix] should acquire db lock out of createLoadTask to avoid dead lock
kaijianding Jan 19, 2025
5715d73
use private
kaijianding Jan 20, 2025
22e17dc
rename
kaijianding Jan 20, 2025
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46 changes: 19 additions & 27 deletions fe/fe-core/src/main/java/com/starrocks/load/streamload/StreamLoadMgr.java
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,7 @@ public void beginLoadTaskFromFrontend(String dbName, String tableName, String la
} finally {
readUnlock();
}
Table table = checkMeta(db, tableName);

boolean createTask = true;

Expand All @@ -144,7 +145,7 @@ public void beginLoadTaskFromFrontend(String dbName, String tableName, String la
task.beginTxnFromFrontend(channelId, channelNum, resp);
return;
}
task = createLoadTask(db, tableName, label, user, clientIp, timeoutMillis, channelNum, channelId, warehouseId);
task = createLoadTask(db, table, label, user, clientIp, timeoutMillis, channelNum, channelId, warehouseId);
LOG.info(new LogBuilder(LogKey.STREAM_LOAD_TASK, task.getId())
.add("msg", "create load task").build());
addLoadTask(task);
Expand All @@ -166,10 +167,11 @@ public void beginLoadTaskFromBackend(String dbName, String tableName, String lab
StreamLoadTask task = null;
Database db = checkDbName(dbName);
long dbId = db.getId();
Table table = checkMeta(db, tableName);

writeLock();
try {
task = createLoadTask(db, tableName, label, user, clientIp, timeoutMillis, isRoutineLoad, warehouseId);
task = createLoadTask(db, table, label, user, clientIp, timeoutMillis, isRoutineLoad, warehouseId);
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LOG.info(new LogBuilder(LogKey.STREAM_LOAD_TASK, task.getId())
.add("msg", "create load task").build());

Expand All @@ -181,19 +183,8 @@ public void beginLoadTaskFromBackend(String dbName, String tableName, String lab
}

// for sync stream load
public StreamLoadTask createLoadTask(Database db, String tableName, String label, String user, String clientIp,
long timeoutMillis, boolean isRoutineLoad, long warehouseId)
throws StarRocksException {
Table table;
Locker locker = new Locker();
locker.lockDatabase(db.getId(), LockType.READ);
try {
unprotectedCheckMeta(db, tableName);
table = GlobalStateMgr.getCurrentState().getLocalMetastore().getTable(db.getFullName(), tableName);
} finally {
locker.unLockDatabase(db.getId(), LockType.READ);
}

public StreamLoadTask createLoadTask(Database db, Table table, String label, String user, String clientIp,
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long timeoutMillis, boolean isRoutineLoad, long warehouseId) {
// init stream load task
long id = GlobalStateMgr.getCurrentState().getNextId();
StreamLoadTask streamLoadTask = new StreamLoadTask(id, db, (OlapTable) table,
Expand All @@ -212,27 +203,27 @@ public StreamLoadTask createLoadTaskWithoutLock(Database db, String tableName, S
return streamLoadTask;
}

public StreamLoadTask createLoadTask(Database db, String tableName, String label, String user, String clientIp,
public StreamLoadTask createLoadTask(Database db, Table table, String label, String user, String clientIp,
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long timeoutMillis, int channelNum,
int channelId, long warehouseId) throws StarRocksException {
Table table;
int channelId, long warehouseId) {
// init stream load task
long id = GlobalStateMgr.getCurrentState().getNextId();
StreamLoadTask streamLoadTask = new StreamLoadTask(id, db, (OlapTable) table,
label, user, clientIp, timeoutMillis, channelNum, channelId, System.currentTimeMillis(), warehouseId);
return streamLoadTask;
}

private Table checkMeta(Database db, String tableName) throws StarRocksException {
Locker locker = new Locker();
locker.lockDatabase(db.getId(), LockType.READ);
try {
unprotectedCheckMeta(db, tableName);
table = GlobalStateMgr.getCurrentState().getLocalMetastore().getTable(db.getFullName(), tableName);
return unprotectedCheckMeta(db, tableName);
} finally {
locker.unLockDatabase(db.getId(), LockType.READ);
}

// init stream load task
long id = GlobalStateMgr.getCurrentState().getNextId();
StreamLoadTask streamLoadTask = new StreamLoadTask(id, db, (OlapTable) table,
label, user, clientIp, timeoutMillis, channelNum, channelId, System.currentTimeMillis(), warehouseId);
return streamLoadTask;
}

public void unprotectedCheckMeta(Database db, String tblName)
public Table unprotectedCheckMeta(Database db, String tblName)
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throws StarRocksException {
if (tblName == null) {
throw new AnalysisException("Table name must be specified when calling /begin/transaction/ first time");
Expand All @@ -253,6 +244,7 @@ public void unprotectedCheckMeta(Database db, String tblName)
if (!table.isOlapOrCloudNativeTable()) {
throw new AnalysisException("Only olap/lake table support stream load");
}
return table;
}

public void replayCreateLoadTask(StreamLoadTask loadJob) {
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