Hello, I noticed that first trigger a savepoint and then delete the deployment might cause the duplicate data issue. That could pose a bad influence to the semantic correctness. Please give me some hints on how to make the stopWithSavepoint() work correctly with Fabric8io Java k8s client to perform this image update operation. Thanks!
Best, Fuyao From: Fuyao Li <fuyao...@oracle.com> Date: Friday, April 30, 2021 at 18:03 To: user <user@flink.apache.org>, Yang Wang <danrtsey...@gmail.com> Subject: [External] : Re: StopWithSavepoint() method doesn't work in Java based flink native k8s operator Hello Community, Yang, I have one more question for logging. I also noticed that if I execute kubectl logs command to the JM. The pods provisioned by the operator can’t print out the internal Flink logs in the kubectl logs. I can only get something like the logs below. No actual flink logs is printed here… Where can I find the path to the logs? Maybe use a sidecar container to get it out? How can I get the logs without checking the Flink WebUI? Also, the sed error makes me confused here. In fact, the application is already up and running correctly if I access the WebUI through Ingress. Reference: https://github.com/wangyang0918/flink-native-k8s-operator/issues/4<https://urldefense.com/v3/__https:/github.com/wangyang0918/flink-native-k8s-operator/issues/4__;!!GqivPVa7Brio!PZPkOj4s7du8ItEG-AxKGR2EN6pWDuKfwcjZNKbpLfhXHRD3IoaH6zptEJWo5vM$> [root@bastion deploy]# kubectl logs -f flink-demo-594946fd7b-822xk sed: couldn't open temporary file /opt/flink/conf/sedh1M3oO: Read-only file system sed: couldn't open temporary file /opt/flink/conf/sed8TqlNR: Read-only file system /docker-entrypoint.sh: line 75: /opt/flink/conf/flink-conf.yaml: Read-only file system sed: couldn't open temporary file /opt/flink/conf/sedvO2DFU: Read-only file system /docker-entrypoint.sh: line 88: /opt/flink/conf/flink-conf.yaml: Read-only file system /docker-entrypoint.sh: line 90: /opt/flink/conf/flink-conf.yaml.tmp: Read-only file system Start command: $JAVA_HOME/bin/java -classpath $FLINK_CLASSPATH -Xmx3462817376 -Xms3462817376 -XX:MaxMetaspaceSize=268435456 org.apache.flink.kubernetes.entrypoint.KubernetesApplicationClusterEntrypoint -D jobmanager.memory.off-heap.size=134217728b -D jobmanager.memory.jvm-overhead.min=429496736b -D jobmanager.memory.jvm-metaspace.size=268435456b -D jobmanager.memory.heap.size=3462817376b -D jobmanager.memory.jvm-overhead.max=429496736b ERROR StatusLogger No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html<https://urldefense.com/v3/__https:/logging.apache.org/log4j/2.x/manual/configuration.html__;!!GqivPVa7Brio!PZPkOj4s7du8ItEG-AxKGR2EN6pWDuKfwcjZNKbpLfhXHRD3IoaH6zptpRoiZsE$> for instructions on how to configure Log4j 2 WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.apache.flink.api.java.ClosureCleaner (file:/opt/flink/lib/flink-dist_2.11-1.12.1.jar) to field java.util.Properties.serialVersionUID WARNING: Please consider reporting this to the maintainers of org.apache.flink.api.java.ClosureCleaner WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release -------- The logs stops here, flink applications logs doesn’t get printed here anymore--------- ^C [root@bastion deploy]# kubectl logs -f flink-demo-taskmanager-1-1 sed: couldn't open temporary file /opt/flink/conf/sedaNDoNR: Read-only file system sed: couldn't open temporary file /opt/flink/conf/seddze7tQ: Read-only file system /docker-entrypoint.sh: line 75: /opt/flink/conf/flink-conf.yaml: Read-only file system sed: couldn't open temporary file /opt/flink/conf/sedYveZoT: Read-only file system /docker-entrypoint.sh: line 88: /opt/flink/conf/flink-conf.yaml: Read-only file system /docker-entrypoint.sh: line 90: /opt/flink/conf/flink-conf.yaml.tmp: Read-only file system Start command: $JAVA_HOME/bin/java -classpath $FLINK_CLASSPATH -Xmx697932173 -Xms697932173 -XX:MaxDirectMemorySize=300647712 -XX:MaxMetaspaceSize=268435456 org.apache.flink.kubernetes.taskmanager.KubernetesTaskExecutorRunner -D taskmanager.memory.framework.off-heap.size=134217728b -D taskmanager.memory.network.max=166429984b -D taskmanager.memory.network.min=166429984b -D taskmanager.memory.framework.heap.size=134217728b -D taskmanager.memory.managed.size=665719939b -D taskmanager.cpu.cores=1.0 -D taskmanager.memory.task.heap.size=563714445b -D taskmanager.memory.task.off-heap.size=0b --configDir /opt/flink/conf -Djobmanager.memory.jvm-overhead.min='429496736b' -Dpipeline.classpaths='file:usrlib/quickstart-0.1.jar' -Dtaskmanager.resource-id='flink-demo-taskmanager-1-1' -Djobmanager.memory.off-heap.size='134217728b' -Dexecution.target='embedded' -Dweb.tmpdir='/tmp/flink-web-d7691661-fac5-494e-8154-896b4fe30692' -Dpipeline.jars='file:/opt/flink/usrlib/quickstart-0.1.jar' -Djobmanager.memory.jvm-metaspace.size='268435456b' -Djobmanager.memory.heap.size='3462817376b' -Djobmanager.memory.jvm-overhead.max='429496736b' ERROR StatusLogger No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html<https://urldefense.com/v3/__https:/logging.apache.org/log4j/2.x/manual/configuration.html__;!!GqivPVa7Brio!PZPkOj4s7du8ItEG-AxKGR2EN6pWDuKfwcjZNKbpLfhXHRD3IoaH6zptpRoiZsE$> for instructions on how to configure Log4j 2 WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.apache.flink.shaded.akka.org.jboss.netty.util.internal.ByteBufferUtil (file:/opt/flink/lib/flink-dist_2.11-1.12.1.jar) to method java.nio.DirectByteBuffer.cleaner() WARNING: Please consider reporting this to the maintainers of org.apache.flink.shaded.akka.org.jboss.netty.util.internal.ByteBufferUtil WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Apr 29, 2021 12:58:34 AM oracle.simplefan.impl.FanManager configure SEVERE: attempt to configure ONS in FanManager failed with oracle.ons.NoServersAvailable: Subscription time out -------- The logs stops here, flink applications logs doesn’t get printed here anymore--------- Best, Fuyao From: Fuyao Li <fuyao...@oracle.com> Date: Friday, April 30, 2021 at 16:50 To: user <user@flink.apache.org>, Yang Wang <danrtsey...@gmail.com> Subject: [External] : StopWithSavepoint() method doesn't work in Java based flink native k8s operator Hello Community, Yang, I am trying to extend the flink native Kubernetes operator by adding some new features based on the repo [1]. I wrote a method to release the image update functionality. [2] I added the triggerImageUpdate(oldFlinkApp, flinkApp, effectiveConfig); under the existing method. triggerSavepoint(oldFlinkApp, flinkApp, effectiveConfig); I wrote a function to accommodate the image change behavior.[2] Solution1: I want to use stopWithSavepoint() method to complete the task. However, I found it will get stuck and never get completed. Even if I use get() for the completeableFuture. It will always timeout and throw exceptions. See solution 1 logs [3] Solution2: I tried to trigger a savepoint, then delete the deployment in the code and then create a new application with new image. This seems to work fine. Log link: [4] My questions: 1. Why solution 1 will get stuck? triggerSavepoint() CompleteableFuture could work here… Why stopWithSavepoint() will always get stuck or timeout? Very confused. 2. For Fabric8io library, I am still new to it, did I do anything wrong in the implementation, maybe I should update the jobStatus? Please give me some suggestions. 3. For work around solution 2, is there any bad influence I didn’t notice? [1] https://github.com/wangyang0918/flink-native-k8s-operator<https://urldefense.com/v3/__https:/github.com/wangyang0918/flink-native-k8s-operator__;!!GqivPVa7Brio!PJIKFBi86alhx1DCxiWp8FkWKToD8XC8tNHFFrYSZj3AKM3zqyiNRjijNSMY0DI$> [2] https://pastebin.ubuntu.com/p/tQShjmdcJt/<https://urldefense.com/v3/__https:/pastebin.ubuntu.com/p/tQShjmdcJt/__;!!GqivPVa7Brio!PJIKFBi86alhx1DCxiWp8FkWKToD8XC8tNHFFrYSZj3AKM3zqyiNRjijoiwPw-I$> [3] https://pastebin.ubuntu.com/p/YHSPpK4W4Z/<https://urldefense.com/v3/__https:/pastebin.ubuntu.com/p/YHSPpK4W4Z/__;!!GqivPVa7Brio!PJIKFBi86alhx1DCxiWp8FkWKToD8XC8tNHFFrYSZj3AKM3zqyiNRjijmgfSmqs$> [4] https://pastebin.ubuntu.com/p/3VG7TtXXfh/<https://urldefense.com/v3/__https:/pastebin.ubuntu.com/p/3VG7TtXXfh/__;!!GqivPVa7Brio!PJIKFBi86alhx1DCxiWp8FkWKToD8XC8tNHFFrYSZj3AKM3zqyiNRjijr_tizPo$> Best, Fuyao
