I have not tried on bare metal. We have no option but k8s. And this is a job cluster.
On Sat, Jun 29, 2019 at 9:01 AM Timothy Victor <vict...@gmail.com> wrote: > Hi Vishal, can this be reproduced on a bare metal instance as well? Also > is this a job or a session cluster? > > Thanks > > Tim > > On Sat, Jun 29, 2019, 7:50 AM Vishal Santoshi <vishal.santo...@gmail.com> > wrote: > >> OK this happened again and it is bizarre ( and is definitely not what I >> think should happen ) >> >> >> >> >> The job failed and I see these logs ( In essence it is keeping the last >> 5 externalized checkpoints ) but deleting the zk checkpoints directory >> >> >> >> >> >> >> *06.28.2019 20:33:13.738 2019-06-29 00:33:13,736 INFO >> org.apache.flink.runtime.checkpoint.CompletedCheckpoint - Checkpoint >> with ID 5654 at >> 'xxxxxxxxxx:8020/analytics_eng/kafka-to-hdfs-states/00000000000000000000000000000005/chk-5654' >> not discarded. 06.28.2019 20:33:13.788 2019-06-29 00:33:13,786 INFO >> org.apache.flink.runtime.checkpoint.CompletedCheckpoint - Checkpoint >> with ID 5655 at >> 'xxxxxxxxxx:8020/analytics_eng/kafka-to-hdfs-states/00000000000000000000000000000005/chk-5655' >> not discarded. 06.28.2019 20:33:13.838 2019-06-29 00:33:13,836 INFO >> org.apache.flink.runtime.checkpoint.CompletedCheckpoint - Checkpoint >> with ID 5656 at >> 'xxxxxxxxxx8020/analytics_eng/kafka-to-hdfs-states/00000000000000000000000000000005/chk-5656' >> not discarded. 06.28.2019 20:33:13.888 2019-06-29 00:33:13,886 INFO >> org.apache.flink.runtime.checkpoint.CompletedCheckpoint - Checkpoint >> with ID 5657 at >> 'xxxxxxxxxx:8020/analytics_eng/kafka-to-hdfs-states/00000000000000000000000000000005/chk-5657' >> not discarded. 06.28.2019 20:33:13.938 2019-06-29 00:33:13,936 INFO >> org.apache.flink.runtime.checkpoint.CompletedCheckpoint - Checkpoint >> with ID 5658 at >> 'xxxxxxxxxx8020/analytics_eng/kafka-to-hdfs-states/00000000000000000000000000000005/chk-5658' >> not discarded. 06.28.2019 20:33:13.938 2019-06-29 00:33:13,936 INFO >> org.apache.flink.runtime.zookeeper.ZooKeeperStateHandleStore - Removing >> /kafka-to-hdfs-v2/kafka-to-hdfs-v2/k8s/checkpoints/00000000000000000000000000000005 >> from ZooKeeper* >> >> The job restarts and this is bizzare. It does not find the ZK checkpoint >> directory but instead of going to the state.checkpoints.dir to get it's >> last checkpoint, it restarts from a save point that we started this job >> with ( resetting the checkpoint id ) like about 15 days ago >> >> >> >> >> >> >> >> >> >> >> * 06.28.2019 20:33:20.047 2019-06-29 00:33:20,045 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Recovering checkpoints from ZooKeeper. 06.28.2019 20:33:20.053 >> 2019-06-29 00:33:20,051 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Trying to fetch 0 checkpoints from storage. 06.28.2019 20:33:20.053 >> 2019-06-29 00:33:20,051 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Found 0 checkpoints in ZooKeeper. 06.28.2019 20:33:20.054 2019-06-29 >> 00:33:20,053 INFO >> org.apache.flink.runtime.checkpoint.CheckpointCoordinator - Starting >> job 00000000000000000000000000000005 from savepoint >> hdfs://nn-crunchy:8020/flink-savepoints_k8s/prod/kafka-to-hdfs/savepoint-000000-128f419cdc6f >> () 06.28.2019 20:33:20.540 2019-06-29 00:33:20,538 INFO >> org.apache.flink.runtime.checkpoint.CheckpointCoordinator - Reset the >> checkpoint ID of job 00000000000000000000000000000005 to 4203. >> 06.28.2019 20:33:20.540 2019-06-29 00:33:20,538 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Recovering checkpoints from ZooKeeper. 06.28.2019 20:33:20.550 >> 2019-06-29 00:33:20,549 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Trying to retrieve checkpoint 4202. 06.28.2019 20:33:20.550 >> 2019-06-29 00:33:20,548 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Found 1 checkpoints in ZooKeeper. 06.28.2019 20:33:20.550 2019-06-29 >> 00:33:20,549 INFO >> org.apache.flink.runtime.checkpoint.ZooKeeperCompletedCheckpointStore - >> Trying to fetch 1 checkpoints from storage.* >> >> >> >> This just does not make sense.... >> >> >> >> >> >> >> >> >> >> >> >> >> >> On Wed, Jun 5, 2019 at 9:29 AM Vishal Santoshi <vishal.santo...@gmail.com> >> wrote: >> >>> Ok, I will do that. >>> >>> On Wed, Jun 5, 2019, 8:25 AM Chesnay Schepler <ches...@apache.org> >>> wrote: >>> >>>> Can you provide us the jobmanager logs? >>>> >>>> After the first restart the JM should have started deleting older >>>> checkpoints as new ones were created. >>>> After the second restart the JM should have recovered all 10 >>>> checkpoints, start from the latest, and start pruning old ones as new ones >>>> were created. >>>> >>>> So you're running into 2 separate issues here, which is a bit odd. >>>> >>>> On 05/06/2019 13:44, Vishal Santoshi wrote: >>>> >>>> Any one? >>>> >>>> On Tue, Jun 4, 2019, 2:41 PM Vishal Santoshi <vishal.santo...@gmail.com> >>>> wrote: >>>> >>>>> The above is flink 1.8 >>>>> >>>>> On Tue, Jun 4, 2019 at 12:32 PM Vishal Santoshi < >>>>> vishal.santo...@gmail.com> wrote: >>>>> >>>>>> I had a sequence of events that created this issue. >>>>>> >>>>>> * I started a job and I had the state.checkpoints.num-retained: 5 >>>>>> >>>>>> * As expected I have 5 latest checkpoints retained in my hdfs >>>>>> backend. >>>>>> >>>>>> >>>>>> * JM dies ( K8s limit etc ) without cleaning the hdfs directory. The >>>>>> k8s job restores from the latest checkpoint ( I think ) but as it >>>>>> creates >>>>>> new checkpoints it does not delete the older chk point. At the end there >>>>>> are now 10 chkpoints, 5 from the old run which remain static and 5 >>>>>> latest >>>>>> representing the on going pipe. >>>>>> >>>>>> * The JM dies again and restart from the latest from the 5 old >>>>>> checkpoints. >>>>>> >>>>>> This looks a bug in the Job Cluster implementation of flink. It looks >>>>>> like it is taking the 5th checkpoint from the beginning based on >>>>>> num-retained value, Note that it has the same job id and does not scope >>>>>> to >>>>>> a new directory. >>>>>> >>>>>> >>>>>> https://github.com/apache/flink/blob/1dfdaa417ab7cdca9bef1efe6381c7eb67022aaf/flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/ZooKeeperCompletedCheckpointStore.java#L109 >>>>>> >>>>>> Please tell me if this does not make sense. >>>>>> >>>>>> Vishal >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>
