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Posted to hdfs-dev@hadoop.apache.org by "Doroszlai, Attila (Jira)" <ji...@apache.org> on 2019/09/13 11:42:00 UTC
[jira] [Created] (HDDS-2123) Stalled multi-threaded initial key
creation
Doroszlai, Attila created HDDS-2123:
---------------------------------------
Summary: Stalled multi-threaded initial key creation
Key: HDDS-2123
URL: https://issues.apache.org/jira/browse/HDDS-2123
Project: Hadoop Distributed Data Store
Issue Type: Bug
Affects Versions: 0.5.0
Reporter: Doroszlai, Attila
Multi-threaded key creation via Freon is stalled with to {{appendEntries Timeout}}:
{code:title=repro}
cd hadoop-ozone/dist/target/ozone-0.5.0-SNAPSHOT/compose/ozone
docker-compose up -d --scale datanode=3
docker-compose exec scm ozone freon rk --numOfVolumes=1 --numOfBuckets=1 --numOfKeys=10 --numOfThreads=10 --replicationType=RATIS --factor=THREE
{code}
{code:title=log sample}
...
datanode_3 | 2019-09-13 10:46:11 INFO SegmentedRaftLogWorker:569 - ce855ef6-55f7-4725-a329-f51dff189098@group-E5C50B0B909A-SegmentedRaftLogWorker: created new log segment /data/metadata/ratis/21ee95af-dd0e-464e-8db1-e5c50b0b909a/current
/log_inprogress_0
datanode_3 | 2019-09-13 10:50:30 WARN GrpcLogAppender:200 - ce855ef6-55f7-4725-a329-f51dff189098@group-E5C50B0B909A->5d9f5b5e-c9ef-4425-9cda-f0529bb810d9-GrpcLogAppender: appendEntries Timeout, request=ce855ef6-55f7-4725-a329-f51dff189098->5d9f5b5e-c9ef-4425-9cda-f0529bb810d9#105-t2, previous=(t:2, i:2), leaderCommit=2, initializing? false, entries: size=1, first=(t:2, i:3), STATEMACHINELOGENTRY, client-C2E2361828A7, cid=3
...
{code}
This seems to happen only if executed as a first key creation command. Works fine after having created some keys from single-thread (using {{ozone sh}} or {{ozone freon rk --numOfThreads=1 ...}}).
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