Hi, Sorry for the late reply. It took me quite a while to change the JDK version to reproduce the issue. I confirmed that if I upgrade to a newer JDK version (I tried with JDK 1.8.0_265) the issue doesn’t happen.
Thank you for helping -Binh On Fri, Oct 9, 2020 at 11:36 AM Piotr Nowojski <pnowoj...@apache.org> wrote: > Hi Binh, > > Could you try upgrading Flink's Java runtime? It was previously reported > that upgrading to jdk1.8.0_251 was solving the problem. > > Piotrek > > pt., 9 paź 2020 o 19:41 Binh Nguyen Van <binhn...@gmail.com> napisał(a): > >> Hi, >> >> Thank you for helping me! >> The code is compiled on >> >> java version "1.8.0_161" >> Java(TM) SE Runtime Environment (build 1.8.0_161-b12) >> Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode) >> >> But I just checked our Hadoop and its Java version is >> >> java version "1.8.0_77" >> Java(TM) SE Runtime Environment (build 1.8.0_77-b03) >> Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode) >> >> Thanks >> -Binh >> >> On Fri, Oct 9, 2020 at 10:23 AM Piotr Nowojski <pnowoj...@apache.org> >> wrote: >> >>> Hi, >>> >>> One more thing. It looks like it's not a Flink issue, but some JDK bug. >>> Others reported that upgrading JDK version (for example to jdk1.8.0_251) >>> seemed to be solving this problem. What JDK version are you using? >>> >>> Piotrek >>> >>> pt., 9 paź 2020 o 17:59 Piotr Nowojski <pnowoj...@apache.org> >>> napisał(a): >>> >>>> Hi, >>>> >>>> Thanks for reporting the problem. I think this is a known issue [1] on >>>> which we are working to fix. >>>> >>>> Piotrek >>>> >>>> [1] https://issues.apache.org/jira/browse/FLINK-18196 >>>> >>>> pon., 5 paź 2020 o 08:54 Binh Nguyen Van <binhn...@gmail.com> >>>> napisał(a): >>>> >>>>> Hi, >>>>> >>>>> I have a streaming job that is written in Apache Beam and uses Flink >>>>> as its runner. The job is working as expected for about 15 hours and then >>>>> it started to have checkpointing error. The error message looks like this >>>>> >>>>> java.lang.Exception: Could not perform checkpoint 910 for operator >>>>> Source: <source-name> (8/60). >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpoint(StreamTask.java:785) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$triggerCheckpointAsync$3(StreamTask.java:760) >>>>> at java.util.concurrent.FutureTask.run(FutureTask.java:266) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.run(StreamTaskActionExecutor.java:87) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:78) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:261) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:186) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:485) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:469) >>>>> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:708) >>>>> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:533) >>>>> at java.lang.Thread.run(Thread.java:745) >>>>> Caused by: java.lang.NullPointerException >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.executeCheckpointing(StreamTask.java:1394) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.checkpointState(StreamTask.java:974) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$performCheckpoint$5(StreamTask.java:870) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:94) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:843) >>>>> at >>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpoint(StreamTask.java:776) >>>>> ... 11 more >>>>> >>>>> When this happened, I have to stop the job and then start it again, >>>>> and then 15 hours later the issue happens again. >>>>> >>>>> Here are some additional information >>>>> >>>>> - Flink version is 1.10.1 >>>>> - Job reads data from Kafka, transform, and then writes to Kafka >>>>> - There are 6 tasks with the parallelism of 60 each (each task >>>>> reads from 1 Kafka topic) >>>>> - The job is deployed to run on YARN with 60 task managers and >>>>> each task manager has 1 slot >>>>> - The State backend is filesystem and HDFS is the storage (Doesn’t >>>>> seem to related to the type of state backend since the issue also >>>>> happened >>>>> when I use memory as the state backend) >>>>> - The checkpointing interval is 60 seconds (The longest duration >>>>> of the normal checkpoint as shown in Flink UI is 14 seconds) >>>>> - The minimum pause between checkpoints is 30 seconds >>>>> - Hadoop cluster is Kerberized but Kafka is not. Keytab and >>>>> principal are set in the Flink configuration file >>>>> >>>>> Can someone please help? >>>>> >>>>> Thanks >>>>> -Binh >>>>> >>>>
