danny0405 commented on code in PR #19432:
URL: https://github.com/apache/hudi/pull/19432#discussion_r3689002124
##########
hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/sink/StreamWriteOperatorCoordinator.java:
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@@ -254,8 +254,12 @@ public void start() throws Exception {
}
restoreEvents(Long.MAX_VALUE);
} catch (Throwable throwable) {
- log.error("Failed to start operator coordinator.", throwable);
- context.failJob(throwable);
+ // Rethrow instead of context.failJob(): failJob triggers an in-graph
global failover that
+ // keeps this same coordinator instance alive without calling start()
again, leaving the
+ // half-initialized null fields (executor, writeClient, metaClient ...)
to be reused and NPE
+ // later. Rethrowing surfaces the failure as a JobMaster start failure
so the partially
+ // initialized instance is discarded rather than kept serving.
+ throw new HoodieException("Failed to start operator coordinator.",
throwable);
Review Comment:
[P1] Preserve fatal errors instead of wrapping them
Because this catch handles `Throwable`, it also wraps `OutOfMemoryError`,
`InternalError`, `UnknownError`, and `ThreadDeath` in a `HoodieException`.
Flink `DefaultOperatorCoordinatorHandler.startOperatorCoordinators(...)` calls
`ExceptionUtils.rethrowIfFatalErrorOrOOM(t)` on the top-level throwable only,
so the wrapper prevents these fatal conditions from being recognized and
downgrades them to a recoverable JobMaster startup failure. Please either catch
`Exception` here (letting `Error`s propagate) or call
`ExceptionUtils.rethrowIfFatalErrorOrOOM(throwable)` before constructing the
wrapper.
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