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https://issues.apache.org/jira/browse/HBASE-25797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17338700#comment-17338700
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Toshihiro Suzuki commented on HBASE-25797:
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Thank you [~bryson],
Can you please try to call the get() method of the CompletableFuture object
returned by table.put() as follows:
{code}
// add r1
table.put(Arrays.asList(
new Put(Bytes.toBytes("r1")).addColumn(COL_FAMILY, Bytes.toBytes("q1"),
Bytes.toBytes("v1")))).get();
{code}
As the *table* is AysncTable, we need to wait for table.put() to complete
before calling table.checkAndMutate(). Thanks.
> Batch version of checkAndMutate on AsyncTable always returns false
> ------------------------------------------------------------------
>
> Key: HBASE-25797
> URL: https://issues.apache.org/jira/browse/HBASE-25797
> Project: HBase
> Issue Type: Bug
> Components: Client
> Affects Versions: 2.4.1
> Reporter: Hochul Shin
> Priority: Minor
> Labels: bug
>
> Batch version of CheckAndMutate always returns false whereas non-batch
> version works fine.
> The code is like:
>
> {code:java}
> AysncTable<?> table = connection.getTable(tableName, executorService);
> ...
> // add r1
> table.put(Arrays.asList(
> new Put(Bytes.toBytes("r1")).addColumn(COL_FAMILY, Bytes.toBytes("q1"),
> Bytes.toBytes("v1"))));
> CheckAndMutate checkAndMutate1 =
> CheckAndMutate.newBuilder(Bytes.toBytes("r1"))
> .ifNotExists(COL_FAMILY, Bytes.toBytes("q1"))
> .build(new Put(Bytes.toBytes("r1")).addColumn(COL_FAMILY,
> Bytes.toBytes("q1"), Bytes.toBytes("v1")));
> CheckAndMutate checkAndMutate2 =
> CheckAndMutate.newBuilder(Bytes.toBytes("r2"))
> .ifNotExists(COL_FAMILY, Bytes.toBytes("q2"))
> .build(new Put(Bytes.toBytes("r2")).addColumn(COL_FAMILY,
> Bytes.toBytes("q2"), Bytes.toBytes("v2")));
> {code}
>
> With batch version of checkAndMutate
> {code:java}
> List<CompletableFuture<CheckAndMutateResult>> results =
> table.checkAndMutate(Arrays.asList(checkAndMutate1, checkAndMutate2));
> System.out.println("first: " + results.get(0).join().isSuccess()); // false
> System.out.println("second: " + results.get(1).join().isSuccess()); //false!
> {code}
>
>
> Even it returned false, the r1 was written to the table. (timestamp was
> updated)
>
> With non-batch version of checkAndMutate
>
> {code:java}
> CompletableFuture<CheckAndMutateResult> result1 =
> table.checkAndMutate(checkAndMutate1);
> CompletableFuture<CheckAndMutateResult> result2 =
> table.checkAndMutate(checkAndMutate2);
> System.out.println("first: " + result1.join().isSuccess()); // false
> System.out.println("second: " + result2.join().isSuccess()); // true as
> expected
> {code}
>
> As expected r1 wasn't written to the table.
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