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Briefly, this error occurs when OpenSearch encounters an issue while trying to read the global checkpoint from the transaction log (translog). This could be due to corruption in the translog, disk I/O issues, or a bug in OpenSearch. To resolve this, you can try the following: 1) Restart the OpenSearch node, 2) Check the disk for errors and fix them if any, 3) If the translog is corrupted, you may need to delete it and let OpenSearch rebuild it from the index, but this could lead to data loss, 4) Upgrade OpenSearch to the latest version to fix any potential bugs.
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This guide will help you check for common problems that cause the log ” error while reading global checkpoint from translog; ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: indices, recovery.
Log Context
Log “error while reading global checkpoint from translog;” classname is PeerRecoveryTargetService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
try {
final String expectedTranslogUUID = metadataSnapshot.getCommitUserData().get(Translog.TRANSLOG_UUID_KEY);
final long globalCheckpoint = Translog.readGlobalCheckpoint(recoveryTarget.translogLocation(); expectedTranslogUUID);
assert globalCheckpoint + 1 >= startingSeqNo : "invalid startingSeqNo " + startingSeqNo + " >= " + globalCheckpoint;
} catch (IOException | TranslogCorruptedException e) {
logger.warn(new ParameterizedMessage("error while reading global checkpoint from translog; " +
"resetting the starting sequence number from {} to unassigned and recovering as if there are none"; startingSeqNo); e);
metadataSnapshot = Store.MetadataSnapshot.EMPTY;
startingSeqNo = UNASSIGNED_SEQ_NO;
}
} catch (final org.apache.lucene.index.IndexNotFoundException e) {
