deniskuzZ commented on a change in pull request #1151:
URL: https://github.com/apache/hive/pull/1151#discussion_r442828730
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File path: ql/src/java/org/apache/hadoop/hive/ql/Driver.java
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@@ -675,50 +678,14 @@ private void runInternal(String command, boolean
alreadyCompiled) throws Command
try {
if (!validTxnManager.isValidTxnListState()) {
- LOG.info("Compiling after acquiring locks");
+ LOG.info("Reexecuting after acquiring locks, since snapshot was
outdated.");
// Snapshot was outdated when locks were acquired, hence regenerate
context,
// txn list and retry
- // TODO: Lock acquisition should be moved before analyze, this is a
bit hackish.
- // Currently, we acquire a snapshot, we compile the query wrt that
snapshot,
- // and then, we acquire locks. If snapshot is still valid, we
continue as usual.
- // But if snapshot is not valid, we recompile the query.
- if (driverContext.isOutdatedTxn()) {
- driverContext.getTxnManager().rollbackTxn();
-
- String userFromUGI = DriverUtils.getUserFromUGI(driverContext);
- driverContext.getTxnManager().openTxn(context, userFromUGI,
driverContext.getTxnType());
- lockAndRespond();
- }
- driverContext.setRetrial(true);
- driverContext.getBackupContext().addSubContext(context);
-
driverContext.getBackupContext().setHiveLocks(context.getHiveLocks());
- context = driverContext.getBackupContext();
- driverContext.getConf().set(ValidTxnList.VALID_TXNS_KEY,
- driverContext.getTxnManager().getValidTxns().toString());
- if (driverContext.getPlan().hasAcidResourcesInQuery()) {
- validTxnManager.recordValidWriteIds();
- }
-
- if (!alreadyCompiled) {
- // compile internal will automatically reset the perf logger
- compileInternal(command, true);
- } else {
- // Since we're reusing the compiled plan, we need to update its
start time for current run
-
driverContext.getPlan().setQueryStartTime(driverContext.getQueryDisplay().getQueryStartTime());
- }
-
- if (!validTxnManager.isValidTxnListState()) {
- // Throw exception
- throw handleHiveException(new HiveException("Operation could not
be executed"), 14);
- }
-
- //Reset the PerfLogger
- perfLogger = SessionState.getPerfLogger(true);
-
- // the reason that we set the txn manager for the cxt here is
because each
- // query has its own ctx object. The txn mgr is shared across the
- // same instance of Driver, which can run multiple queries.
- context.setHiveTxnManager(driverContext.getTxnManager());
+ rollback(null);
Review comment:
wrap releaseLocksAndCommitOrRollback(false) with try and throw exception
in finally, instead of rollback null
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