StefanRRichter commented on code in PR #22788:
URL: https://github.com/apache/flink/pull/22788#discussion_r1234916685
##########
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBStateDownloader.java:
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@@ -90,27 +80,62 @@ private void downloadDataForAllStateHandles(
} else {
throw new FlinkRuntimeException("Failed to download data for
state handles.", e);
}
+ } finally {
+ // Unregister and close the internal closer. In a failure case,
this should interrupt
+ // ongoing downloads.
+ closeableRegistry.unregisterCloseable(internalCloser);
+ IOUtils.closeQuietly(internalCloser);
+ if (failureCleanupRequired) {
+ // Cleanup on exception: cancel all tasks and delete the
created directories
+ futures.forEach(future -> future.cancel(true));
+ downloadRequests.stream()
+ .map(StateHandleDownloadSpec::getDownloadDestination)
+ .map(Path::toFile)
+ .forEach(FileUtils::deleteDirectoryQuietly);
+ }
Review Comment:
Two reasons:
- the code was written to catch only execution exception, but I want to make
sure the cleanup happens also for any other exception.
- For cleanup, I first want to close the registry to interrupt the IO in all
parallel tasks, but I also want to close the registry in the finally block, so
it would have slightly more code duplication.
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