deniskuzZ commented on a change in pull request #1275:
URL: https://github.com/apache/hive/pull/1275#discussion_r458651847
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Cleaner.java
##########
@@ -80,39 +98,58 @@ public void run() {
HiveConf.ConfVars.HIVE_COMPACTOR_CLEANER_RUN_INTERVAL,
TimeUnit.MILLISECONDS);
}
- do {
- TxnStore.MutexAPI.LockHandle handle = null;
- long startedAt = -1;
- // Make sure nothing escapes this run method and kills the metastore at
large,
- // so wrap it in a big catch Throwable statement.
- try {
- handle =
txnHandler.getMutexAPI().acquireLock(TxnStore.MUTEX_KEY.Cleaner.name());
- startedAt = System.currentTimeMillis();
- long minOpenTxnId = txnHandler.findMinOpenTxnIdForCleaner();
- for(CompactionInfo compactionInfo : txnHandler.findReadyToClean()) {
- clean(compactionInfo, minOpenTxnId);
+ try {
+ do {
+ TxnStore.MutexAPI.LockHandle handle = null;
+ long startedAt = -1;
+ // Make sure nothing escapes this run method and kills the metastore
at large,
+ // so wrap it in a big catch Throwable statement.
+ try {
+ handle =
txnHandler.getMutexAPI().acquireLock(TxnStore.MUTEX_KEY.Cleaner.name());
+ startedAt = System.currentTimeMillis();
+ long minOpenTxnId = txnHandler.findMinOpenTxnIdForCleaner();
+ int count = 0;
+ for(CompactionInfo compactionInfo : txnHandler.findReadyToClean()) {
+ completionService.submit(() -> {
+ ThrowingRunnable.unchecked(() -> clean(compactionInfo,
minOpenTxnId));
+ return null;
+ });
+ count++;
+ }
+
+ for(int i=0; i<count; i++) {
+ try {
+ completionService.take().get();
+ } catch (InterruptedException| ExecutionException ignore) {
+ // What should we do here?
+ }
+ }
+ } catch (Throwable t) {
+ LOG.error("Caught an exception in the main loop of compactor
cleaner, " +
+ StringUtils.stringifyException(t));
}
- } catch (Throwable t) {
- LOG.error("Caught an exception in the main loop of compactor cleaner,
" +
- StringUtils.stringifyException(t));
- }
- finally {
- if (handle != null) {
- handle.releaseLocks();
+ finally {
+ if (handle != null) {
Review comment:
shutdown should be called here, otherwise you can terminate threads from
2nd iteration
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