I revisited the logs, and luckily it hasn’t been cleared. Here is part of the nc1’s log:
May 15, 2016 1:04:10 PM org.apache.hyracks.storage.common.buffercache.BufferCache openFile INFO: Opening file: 14 in cache: org.apache.hyracks.storage.common.buffercache.BufferCache@2a7f1f10 May 15, 2016 1:04:10 PM org.apache.hyracks.storage.common.buffercache.BufferCache openFile INFO: Opening file: 13 in cache: org.apache.hyracks.storage.common.buffercache.BufferCache@2a7f1f10 May 15, 2016 1:04:10 PM org.apache.hyracks.storage.common.buffercache.BufferCache createFile INFO: Creating file: /nc1/iodevice1/storage/partition_0/hackathon/log_device_idx_log_device/2016-05-15-12-56-48-712_2016-05-15-12-23-31-225_f in cache: org.apache.hyracks.storage.common.buffercache.BufferCache@2a7f1f10 May 15, 2016 1:04:10 PM org.apache.hyracks.storage.common.buffercache.BufferCache openFile INFO: Opening file: 15 in cache: org.apache.hyracks.storage.common.buffercache.BufferCache@2a7f1f10 —————————————————————————————————————— /// I shut down the cluster from here and start the server right away. —————————————————————————————————————— May 15, 2016 1:43:12 PM org.apache.asterix.transaction.management.service.recovery.RecoveryManager startRecoveryRedoPhase INFO: Logs REDO phase completed. Redo logs count: 1197 May 15, 2016 1:43:12 PM org.apache.hyracks.storage.am.lsm.common.impls.LSMHarness flush INFO: Started a flush operation for index: LSMBTree [/nc1/iodevice1/storage/partition_0/Metadata/Dataset_idx_Dataset/] ... May 15, 2016 1:43:12 PM org.apache.hyracks.storage.common.buffercache.BufferCache createFile INFO: Creating file: /nc1/iodevice1/storage/partition_0/Metadata/Dataset_idx_Dataset/2016-05-15-13-43-12-680_2016-05-15-13-43-12-680_f in cache: org.apache.hyracks.storage.common.buffercache.BufferCache@2a7f1f10 No logs generated in that 43mins. During that time one CPU was exhaustive and I remember no file was touched or generated in the asterix foler. Then it may not be the problem of the buffercache in the recovery phase? > On May 16, 2016, at 9:28 PM, Mike Carey <dtab...@gmail.com> wrote: > > Agreed and agreed. But is the spinning on recovery? > > (What's the role of the buffer cache during recovery?) > > > On 5/17/16 2:10 AM, Jianfeng Jia wrote: >> I think the BuffeCache is the core issue, the recovery process may just run >> into the same spin trap where it was stopped. >> And I create another issue that we should be able to Abort the task so that >> we don’t need to restart the server. >> >>> On May 16, 2016, at 7:24 AM, Michael Blow <mblow.apa...@gmail.com> wrote: >>> >>> This might be related: (ASTERIXDB-1438) BufferCache spins indefinitely when >>> cache is exceeded. >>> >>> https://issues.apache.org/jira/browse/ASTERIXDB-1438 >>> >>> Thanks, >>> >>> -MDB >>> >>> On Mon, May 16, 2016 at 1:52 AM Mike Carey <dtab...@gmail.com> wrote: >>> >>>> Glad it worked out - can someone also capture the core issue in JIRA? Thx! >>>> On May 15, 2016 11:40 PM, "Jianfeng Jia" <jianfeng....@gmail.com> wrote: >>>> >>>>> Great! The server is back now. Thanks a lot! >>>>>> On May 15, 2016, at 2:26 PM, Murtadha Hubail <hubail...@gmail.com> >>>>> wrote: >>>>>> You can delete the existing log files and create new empty ones with >>>>> incremented log file number, but it is very important that you don't >>>>> delete the checkpoint file. >>>>>> Of course any data in the old log files will be lost, but the data >>>>> already on disk will be available. >>>>>>> On May 15, 2016, at 1:23 PM, Jianfeng Jia <jianfeng....@gmail.com> >>>>> wrote: >>>>>>> Hi, >>>>>>> We submitted a long running join+insert query and stop the cluster to >>>>> stop running it. However, when it restarted it ran the recovery forever, >>>>>>> the logs shows that it is creating a lot of buffer cache. >>>>>>> >>>>>>> In order to bring the cluster back to answer the query, is there any >>>>> hacking solutions? such as remove the recovery txnlogs? I’m worried that >>>> it >>>>> will ruin the cluster somehow. >>>>>>> We are in a contest so any early helps are really appreciated! Thanks! >>>>>>> >>>>>>> >>>>>>> Best, >>>>>>> >>>>>>> Jianfeng Jia >>>>>>> PhD Candidate of Computer Science >>>>>>> University of California, Irvine >>>>>>> >>>>> >>>>> >>>>> Best, >>>>> >>>>> Jianfeng Jia >>>>> PhD Candidate of Computer Science >>>>> University of California, Irvine >>>>> >>>>> >> >> >> Best, >> >> Jianfeng Jia >> PhD Candidate of Computer Science >> University of California, Irvine >> >> > Best, Jianfeng Jia PhD Candidate of Computer Science University of California, Irvine
