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 >>> >>
