[jira] [Resolved] (KUDU-2473) READ_YOUR_WRITES error on snapshot timestamp

["Thomas Tauber-Marshall (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KUDU-2473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Tauber-Marshall resolved KUDU-2473.
------------------------------------------
       Resolution: Duplicate
    Fix Version/s: n/a

dup of KUDU-2415

> 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
>            Priority: Critical
>             Fix For: n/a
>
>
> 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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