HBASE-28456 HBase Restore restores old data if data for the same timestamp is in different hfiles #5775
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bbeaudreault
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…stamp is in different hfiles
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ndimiduk
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Mar 26, 2024
| * ExtendedCell. | ||
| */ | ||
| static final String EXTENDED_CELL_SERIALIZATION_ENABLED_KEY = | ||
| public static final String EXTENDED_CELL_SERIALIZATION_ENABLED_KEY = |
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This field is becoming part of the public API. It's worth updating the comment about its usage.
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@ndimiduk I decided to annotate that as IA.Private. I know we generally prefer not to do that for fields/methods, but for better or worse there's already a strong convention of doing it in this class (11 methods annotated IA.Private). It's probably worth a larger refactor/cleanup of HFileOutputFormat2
Let me know if you strongly disagree with this approach
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStoreFile.java
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| /** | ||
| * Cells in a bulkloaded file don't have a sequenceId since they don't go through memstore. When a | ||
| * bulkload file is committed, the current memstore ts is stamped onto the file name as the |
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Yikes! Seems like we need a seqId field in the file header instead of relying on the file name...
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I think the reason why we don't do this already is that a bulkloaded HFile is typically created outside the cluster. At that point, we don't know what the memstore seq id is at. Only at the time of bulkload file commit, when we've locked and flushed the memstore, do we know the memstore seq id.
Since hfiles are immutable, we can't open it at that point and change a metadata. So we need to add it to the filename I guess. I agree relying on the file name seems brittle. A more robust solution might be tricky given the above tho
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Apache9
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| import static org.apache.hadoop.hbase.backup.BackupInfo.BackupState.COMPLETE; | ||
| import static org.apache.hadoop.hbase.backup.BackupType.FULL; | ||
| import static org.junit.Assert.*; |
| import java.io.IOException; | ||
| import java.nio.ByteBuffer; | ||
| import java.time.Instant; | ||
| import java.util.*; |
| } | ||
| value = scanner.getCell(); | ||
| if (value != null && bulkloadSeqId.isPresent()) { | ||
| PrivateCellUtil.setSequenceId(value, bulkloadSeqId.getAsLong()); |
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We can not use bulkloadSeqId.ifPresent because PrivateCellUtil.setSequenceId will throw exceptions?
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Yea setSequenceId throws IOException. Figured it looks cleaner this way
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…stamp is in different hfiles (#5775) Signed-off-by: Nick Dimiduk <[email protected]> Signed-off-by: Duo Zhang <[email protected]>
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…stamp is in different hfiles (#5775) Signed-off-by: Nick Dimiduk <[email protected]> Signed-off-by: Duo Zhang <[email protected]>
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…stamp is in different hfiles (#5775) Signed-off-by: Nick Dimiduk <[email protected]> Signed-off-by: Duo Zhang <[email protected]>
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… for the same timestamp is in different hfiles (apache#5775) Signed-off-by: Nick Dimiduk <[email protected]> Signed-off-by: Duo Zhang <[email protected]>
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_SeqId_handling