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https://issues.apache.org/jira/browse/HBASE-17300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15744018#comment-15744018
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Andrew Purtell edited comment on HBASE-17300 at 12/13/16 3:32 AM:
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Set affected versions as reported. Let me see as part of 0.98.24 work if a port
of this to HBase API only will repro the issue. If so, if an earlier version
worked correctly (0.98.17 perhaps?). If so, what commit broke things.
was (Author: apurtell):
Set fix versions as reported. Let me see as part of 0.98.24 work if a port of
this to HBase API only will repro the issue. If so, if an earlier version
worked correctly (0.98.17 perhaps?). If so, what commit broke things.
> Concurrently calling checkAndPut with expected value as null returns true
> unexpectedly
> --------------------------------------------------------------------------------------
>
> Key: HBASE-17300
> URL: https://issues.apache.org/jira/browse/HBASE-17300
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.23, 1.2.4
> Reporter: Samarth Jain
>
> Attached is the test case. I have added some comments so hopefully the test
> makes sense. It actually is causing test failures on the Phoenix branches.
> PS - I am using a bit of Phoenix API to get hold of HBaseAdmin. But it should
> be fairly straightforward to adopt it for HBase IT tests.
> The test fails consistently using HBase-0.98.23. It exhibits flappy behavior
> with the 1.2 branch (failed twice in 5 tries).
> {code}
> @Test
> public void testNullCheckAndPut() throws Exception {
> try (Connection conn = DriverManager.getConnection(getUrl())) {
> try (HBaseAdmin admin =
> conn.unwrap(PhoenixConnection.class).getQueryServices().getAdmin()) {
> Callable<Boolean> c1 = new CheckAndPutCallable();
> Callable<Boolean> c2 = new CheckAndPutCallable();
> ExecutorService e = Executors.newFixedThreadPool(5);
> Future<Boolean> f1 = e.submit(c1);
> Future<Boolean> f2 = e.submit(c2);
> assertTrue(f1.get() || f2.get());
> assertFalse(f1.get() && f2.get());
> }
> }
> }
>
>
> private static final class CheckAndPutCallable implements
> Callable<Boolean> {
> @Override
> public Boolean call() throws Exception {
> byte[] rowToLock = "ROW".getBytes();
> byte[] colFamily = "COLUMN_FAMILY".getBytes();
> byte[] column = "COLUMN".getBytes();
> byte[] newValue = "NEW_VALUE".getBytes();
> byte[] oldValue = "OLD_VALUE".getBytes();
> byte[] tableName = "table".getBytes();
> boolean acquired = false;
> try (Connection conn = DriverManager.getConnection(getUrl())) {
> try (HBaseAdmin admin =
> conn.unwrap(PhoenixConnection.class).getQueryServices().getAdmin()) {
> HTableDescriptor tableDesc = new
> HTableDescriptor(TableName.valueOf(tableName));
> HColumnDescriptor columnDesc = new
> HColumnDescriptor(colFamily);
> columnDesc.setTimeToLive(600);
> tableDesc.addFamily(columnDesc);
> try {
> admin.createTable(tableDesc);
> } catch (TableExistsException e) {
> // ignore
> }
> try (HTableInterface table =
> admin.getConnection().getTable(tableName)) {
> Put put = new Put(rowToLock);
> put.add(colFamily, column, oldValue); // add a row
> with column set to oldValue
> table.put(put);
> put = new Put(rowToLock);
> put.add(colFamily, column, newValue);
> // only one of the threads should be able to get
> return value of true for the expected value of oldValue
> acquired = table.checkAndPut(rowToLock, colFamily,
> column, oldValue, put);
> if (!acquired) {
> // if a thread didn't get true before, then it
> shouldn't get true this time either
> // because the column DOES exist
> acquired = table.checkAndPut(rowToLock, colFamily,
> column, null, put);
> }
> }
> }
> }
> return acquired;
> }
> }
> {code}
> cc [~apurtell], [~jamestaylor], [~lhofhansl].
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