Re: Checkpoint acknowledge takes too long

2018-10-25 Thread Hequn Cheng
Hi Henry, Thanks for letting us know. On Thu, Oct 25, 2018 at 7:34 PM 徐涛 wrote: > Hi Hequn & Kien, > Finally the problem is solved. > It is due to slow sink write. Because the job only have 2 tasks, I check > the backpressure, found that the source has high backpressure, so I tried > to improve

Re: Checkpoint acknowledge takes too long

2018-10-25 Thread 徐涛
Hi Hequn & Kien, Finally the problem is solved. It is due to slow sink write. Because the job only have 2 tasks, I check the backpressure, found that the source has high backpressure, so I tried to improve the sink write. After that the end to end duration is below 1s and the che

Re: Checkpoint acknowledge takes too long

2018-10-24 Thread Hequn Cheng
Hi Henry, @Kien is right. Take a thread dump to see what was doing in the TaskManager. Also check whether gc happens frequently. Best, Hequn On Wed, Oct 24, 2018 at 5:03 PM 徐涛 wrote: > Hi > I am running a flink application with parallelism 64, I left the > checkpoint timeout default v

Re: Checkpoint acknowledge takes too long

2018-10-24 Thread Kien Truong
Hi, In my experience, this is most likely due to one sub-task is blocked doing some long-running operation. Try to run the task manager with some profiler (like VisualVM) and check for hot spot. Regards, Kien On 10/24/2018 4:02 PM, 徐涛 wrote: Hi I am running a flink application w

Checkpoint acknowledge takes too long

2018-10-24 Thread 徐涛
Hi I am running a flink application with parallelism 64, I left the checkpoint timeout default value, which is 10minutes, the state size is less than 1MB, I am using the FsStateBackend. The application triggers some checkpoints but all of them fails due to "Checkpoint expired be