rmetzger commented on a change in pull request #16483:
URL: https://github.com/apache/flink/pull/16483#discussion_r668962271
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/source/coordinator/SourceCoordinatorProvider.java
##########
@@ -110,18 +115,32 @@ public OperatorCoordinator
getCoordinator(OperatorCoordinator.Context context) {
@Override
public synchronized Thread newThread(Runnable r) {
- if (t != null) {
+ if (t != null && t.isAlive()) {
+ throw new Error(
+ "Source Coordinator Thread already exists. There
should never be more than one "
+ + "thread driving the actions of a Source
Coordinator. Existing Thread: "
+ + t);
+ }
+ if (t != null && previousFailureReason != null) {
throw new Error(
- "This indicates that a fatal error has happened and
caused the "
- + "coordinator executor thread to exit. Check
the earlier logs"
- + "to see the root cause of the problem.");
+ "The following a fatal error has happened in a
previously spawned "
+ + "Source Coordinator thread. No new thread
can be spawned.",
+ previousFailureReason);
Review comment:
```suggestion
"The following fatal error has happened in a
previously spawned "
+ "Source Coordinator thread. No new thread
can be spawned.",
previousFailureReason);
```
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