Thomas Tauber-Marshall created KUDU-2473:
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Summary: READ_YOUR_WRITES error on snapshot timestamp
Key: KUDU-2473
URL: https://issues.apache.org/jira/browse/KUDU-2473
Project: Kudu
Issue Type: Bug
Components: impala
Reporter: Thomas Tauber-Marshall
I'm trying to implement support for READ_YOUR_WRITES for Impala, but I'm
finding that if SetLatestObservedTimestamp() isn't called (eg. because we
haven't interacted with Kudu yet in the current session and don't have a
timestamp to set), attempting to scan tables always fails with an error of the
form:
org.apache.kudu.client.NonRecoverableException: Snapshot timestamp is earlier
than the ancient history mark. Consider increasing the value of the
configuration parameter --tablet_history_max_age_sec. Snapshot timestamp: P: 0
usec, L: 1 Ancient History Mark: P: 1528845756599966 usec, L: 0 Physical time
difference: -1528845756.600s
Minimal repro:
{noformat}
KuduClientBuilder b = new KuduClient.KuduClientBuilder("localhost");
KuduClient client = b.build();
KuduTable table = client.openTable("read_mode_test");
KuduScannerBuilder scannerBuilder = client.newScannerBuilder(table);
scannerBuilder.readMode(AsyncKuduScanner.ReadMode.READ_YOUR_WRITES);
KuduScanner scanner = scannerBuilder.build();
while (scanner.hasMoreRows()) {
scanner.nextRows();
}
{noformat}
I'm using Kudu at git hash a954418
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