61yao opened a new issue, #9789:
URL: https://github.com/apache/pinot/issues/9789
This is happening on MailboxSendOperator getNextBlock().
When sendDataTableBlock is called the first time, send is called on
GrpcSendingMailbox.
GrpcSendingMailbox.send() will call GrpcSendingMailbox.init(), which will
call _statusStreamObserver.send(MAILBOX_METADATA_BEGIN_OF_STREAM_KEY).
If _statusStreamObserver.send() throws an exception, _initialized will not
be set to true. This exception is logged in MailboxSendOperator.getNextBlock()
and not passed to upstream.
Next time the send is called, init will be called again till mailbox send
times out
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