abdessalems commented on issue #11679:
URL: https://github.com/apache/seatunnel/issues/11679#issuecomment-5230272931

   Thanks @loustler. I was able to reproduce the hang in CI and capture thread 
dumps from both the engine and the seatunnel.sh client.
   
   The client is stuck in CompletableFuture.get(), waiting for a result that 
never arrives.
   
   The interesting part is on the engine side: one coordinator thread is 
holding the SubPlan lock while waiting in startedLatch.await(), while another 
thread is blocked trying to enter updatePipelineState() to handle the 
checkpoint error.
   
   So it looks like the client is just a symptom here. The pipeline never 
reaches its terminal state because of the engine-side lock/wait.
   


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