ticsmtc6 commented on issue #1602: TIMEOUT_CLEAN_QUEUE, org.apache.rocketmq.store.ha.HAConnection.ReadSocketService#run this.selector.select(1000) cost 5000+ms URL: https://github.com/apache/rocketmq/issues/1602#issuecomment-557125118 master: brokerRole=SYNC_MASTER flushDiskType=ASYNC_FLUSH slave: brokerRole=SLAVE flushDiskType=ASYNC_FLUSH jvm parameter add:-XX:+PrintSafepointStatistics -XX:PrintSafepointStatisticsCount=1 safepoint log as follow: vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 1656.618: PrintThreads [ 192 0 0 ] [ 0 0 0 0 5962 ] 0 **Why "PrintThreads" vmop causing long vm pause? Does the master slave network problem cause this pause?** @duhengforever
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