codelipenghui edited a comment on issue #3056: Client send timeout happens on one broker URL: https://github.com/apache/pulsar/issues/3056#issuecomment-441868974 After check the broker dump, found some thing strange in current ledger of topic 1. lastAddPushed = 529 and lastAddConfirmed = -1 2. paddingAddOps has 530 elements Here is the screenshot in yourkit  And the broker dump file already upload to the slack: https://apache-pulsar.slack.com/files/UC0BYCXKQ/FEB7C71U0/heap.bin.tar.gz.zip @jiazhai @sijie @merlimat
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