Attila Doroszlai created RATIS-815:
--------------------------------------
Summary: Log entry corrupted with 0 checksum
Key: RATIS-815
URL: https://issues.apache.org/jira/browse/RATIS-815
Project: Ratis
Issue Type: Bug
Affects Versions: 0.5.0
Reporter: Attila Doroszlai
After writing a few large keys (128MB) with very small chunks size (64KB) in
Ozone, Ratis reports log entry corruption due to checksum error:
{code}
2020-02-13 12:01:41 INFO SegmentedRaftLogWorker:396 -
e5e4fd1e-aa81-48a2-98f9-b1ba24531624@group-B85226EEE236-SegmentedRaftLogWorker:
Rolling segment log-62379_62465 to index:62465
2020-02-13 12:01:41 INFO SegmentedRaftLogWorker:541 -
e5e4fd1e-aa81-48a2-98f9-b1ba24531624@group-B85226EEE236-SegmentedRaftLogWorker:
Rolled log segment from
/data/metadata/ratis/f89fc072-9ee9-459b-85d1-b85226eee236/current/log_inprogress_62379
to
/data/metadata/ratis/f89fc072-9ee9-459b-85d1-b85226eee236/current/log_62379-62465
2020-02-13 12:01:41 INFO SegmentedRaftLogWorker:583 -
e5e4fd1e-aa81-48a2-98f9-b1ba24531624@group-B85226EEE236-SegmentedRaftLogWorker:
created new log segment
/data/metadata/ratis/f89fc072-9ee9-459b-85d1-b85226eee236/current/log_inprogress_62466
2020-02-13 12:01:41 ERROR LogAppender:81 -
e5e4fd1e-aa81-48a2-98f9-b1ba24531624@group-B85226EEE236->ac5b3434-874b-4375-8a03-989e8c7fb692-GrpcLogAppender-AppenderDaemon
failed RaftLog
org.apache.ratis.server.raftlog.RaftLogIOException:
org.apache.ratis.protocol.ChecksumException: Log entry corrupted: Calculated
checksum is CDFED097 but read checksum is 00000000.
at
org.apache.ratis.server.raftlog.segmented.LogSegment.loadCache(LogSegment.java:311)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLog.get(SegmentedRaftLog.java:292)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLog.getEntryWithData(SegmentedRaftLog.java:297)
at
org.apache.ratis.server.impl.LogAppender.createRequest(LogAppender.java:213)
at
org.apache.ratis.grpc.server.GrpcLogAppender.appendLog(GrpcLogAppender.java:179)
at
org.apache.ratis.grpc.server.GrpcLogAppender.runAppenderImpl(GrpcLogAppender.java:122)
at
org.apache.ratis.server.impl.LogAppender$AppenderDaemon.run(LogAppender.java:77)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.ratis.protocol.ChecksumException: Log entry corrupted:
Calculated checksum is CDFED097 but read checksum is 00000000.
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogReader.decodeEntry(SegmentedRaftLogReader.java:312)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogReader.readEntry(SegmentedRaftLogReader.java:194)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogInputStream.nextEntry(SegmentedRaftLogInputStream.java:129)
at
org.apache.ratis.server.raftlog.segmented.LogSegment.readSegmentFile(LogSegment.java:98)
at
org.apache.ratis.server.raftlog.segmented.LogSegment$LogEntryLoader.load(LogSegment.java:202)
at
org.apache.ratis.server.raftlog.segmented.LogSegment.loadCache(LogSegment.java:309)
... 7 more
{code}
Steps to reproduce:
1. Configure Ozone with 64KB chunk size and slightly higher buffer sizes:
{code}
ozone.scm.chunk.size: 64KB
ozone.client.stream.buffer.flush.size: 256KB
ozone.client.stream.buffer.max.size: 1MB
{code}
2. Run Freon:
{code}
ozone freon ockg -n 1 -t 1 -p warmup
ozone freon ockg -p test -t 8 -s 134217728 -n 32
{code}
Interestingly, even {{log_5106-5509}} has invalid entry (according to log dump
utility):
{code}
Processing Raft Log file:
/data/metadata/ratis/f89fc072-9ee9-459b-85d1-b85226eee236/current/log_5106-5509
size:1030796
...
(t:1, i:5161), STATEMACHINELOGENTRY, client-296B6A48E40D, cid=3307
Exception in thread "main" org.apache.ratis.protocol.ChecksumException: Log
entry corrupted: Calculated checksum is 926127AE but read checksum is 00000000.
{code}
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