Description
After writing a few large keys (128MB) with very small chunks size (64KB) in Ozone, Ratis reports log entry corruption due to checksum error:
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
Steps to reproduce:
1. Configure Ozone with 64KB chunk size and slightly higher buffer sizes:
ozone.scm.chunk.size: 64KB ozone.client.stream.buffer.flush.size: 256KB ozone.client.stream.buffer.max.size: 1MB
2. Run Freon:
ozone freon ockg -n 1 -t 1 -p warmup ozone freon ockg -p test -t 8 -s 134217728 -n 32
Interestingly, even log_5106-5509 has invalid entry (according to log dump utility):
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.
Attachments
Attachments
Issue Links
- breaks
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RATIS-822 BufferedWriteChannel may not flush correctly
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- Resolved
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