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https://issues.apache.org/jira/browse/BEAM-11996?focusedWorklogId=599395&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-599395
]
ASF GitHub Bot logged work on BEAM-11996:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 19/May/21 18:36
Start Date: 19/May/21 18:36
Worklog Time Spent: 10m
Work Description: boyuanzz commented on a change in pull request #14811:
URL: https://github.com/apache/beam/pull/14811#discussion_r635492915
##########
File path:
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/BatchSpannerRead.java
##########
@@ -104,15 +98,31 @@ public void teardown() throws Exception {
}
@ProcessElement
- public void processElement(ProcessContext c) throws Exception {
+ public void processElement(ProcessContext c,
RestrictionTracker<OffsetRange, Long> tracker)
+ throws Exception {
Transaction tx = c.sideInput(txView);
BatchReadOnlyTransaction context =
spannerAccessor.getBatchClient().batchReadOnlyTransaction(tx.transactionId());
- for (Partition p : execute(c.element(), context)) {
- c.output(p);
+ List<Partition> partitions = execute(c.element(), context);
+ BatchReadOnlyTransaction batchTx =
+
spannerAccessor.getBatchClient().batchReadOnlyTransaction(tx.transactionId());
+ for (int i = (int) tracker.currentRestriction().getFrom(); i <
partitions.size(); i++) {
+ if (tracker.tryClaim(Long.valueOf(i))) {
+ try (ResultSet resultSet = batchTx.execute(partitions.get(i))) {
+ while (resultSet.next()) {
+ Struct s = resultSet.getCurrentRowAsStruct();
+ c.output(s);
+ }
+ }
+ }
}
}
+ @GetInitialRestriction
+ public OffsetRange getInitialRange() {
+ return new OffsetRange(0L, Long.MAX_VALUE);
Review comment:
The `Last attempted offset was 0 in range [0, 9223372036854775807),
claiming work in [1, 9223372036854775807) was not attempted.` failure from your
email is a `checkDone` failure from
https://github.com/apache/beam/blob/a16bbf78bb5b3d3a14d13fb39ed442c612d0b493/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/OffsetRangeTracker.java#L109-L124
By default, your code will use
[OffsetRangeTracker](https://github.com/apache/beam/blob/a16bbf78bb5b3d3a14d13fb39ed442c612d0b493/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/OffsetRangeTracker.java),
which treats `Long.MAX_VALUE` as the real amount of work. You may want to look
into
[GrowableOffsetRangeTracker](https://github.com/apache/beam/blob/a16bbf78bb5b3d3a14d13fb39ed442c612d0b493/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/GrowableOffsetRangeTracker.java)
which treats `Long.MAX_VALUE` as a notion of unknown amount of work.
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Issue Time Tracking
-------------------
Worklog Id: (was: 599395)
Time Spent: 20m (was: 10m)
> Implement SpannerIO on top of Splittable DoFn
> ---------------------------------------------
>
> Key: BEAM-11996
> URL: https://issues.apache.org/jira/browse/BEAM-11996
> Project: Beam
> Issue Type: Improvement
> Components: io-java-gcp
> Reporter: Boyuan Zhang
> Assignee: Miguel Anzo
> Priority: P2
> Time Spent: 20m
> Remaining Estimate: 0h
>
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