lukecwik commented on a change in pull request #12994:
URL: https://github.com/apache/beam/pull/12994#discussion_r498937353
##########
File path:
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/util/common/worker/MapTaskExecutor.java
##########
@@ -146,13 +165,17 @@ public boolean supportsRestart() {
@Override
public void abort() {
// Signal the read loop to abort on the next record.
- // TODO: Also interrupt the execution thread.
for (Operation op : operations) {
Preconditions.checkState(op instanceof ReadOperation || op instanceof
ReceivingOperation);
if (op instanceof ReadOperation) {
((ReadOperation) op).abortReadLoop();
}
}
+ synchronized (this) {
+ if (currentExecutorThread != null) {
+ currentExecutorThread.interrupt();
Review comment:
Internally within Flume we saw with the C++ worker where user code
didn't handle thread::cancel correctly and were relying on process crash to not
get stuck.
I would generally love for us to be able to interrupt random code
arbitrarily as it would be the best and cleanest way to do this.
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