599166320 commented on issue #15177:
URL: https://github.com/apache/druid/issues/15177#issuecomment-1765738367
The following test code can reproduce this exception:
```
@Test
public void testAskBufferFailed() throws Exception
{
final TestCommitterSupplier<Integer> committerSupplier = new
TestCommitterSupplier<>();
Assert.assertNull(driver.startJob(null));
for (int i = 0; i < 2080890; i++) {
char [] c = new char[1024];
char [] arr = UUID.randomUUID().toString().toCharArray();
for (int j = 0; j < arr.length; j ++) {
c[j] = arr[j];
}
committerSupplier.setMetadata(i + 1);
InputRow row = new MapBasedInputRow(
DateTimes.of("2000T01"),
ImmutableList.of("dim2"),
ImmutableMap.of(
"dim2",
new String(c),
"met1",
2.0
)
);
final AppenderatorDriverAddResult addResult = driver.add(row, "dummy",
committerSupplier, false, true);
Assert.assertTrue(addResult.isOk());
}
final SegmentsAndCommitMetadata published = driver.publish(
makeOkPublisher(),
committerSupplier.get(),
ImmutableList.of("dummy")
).get(PUBLISH_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
while (driver.getSegments().containsKey("dummy")) {
Thread.sleep(100);
}
final SegmentsAndCommitMetadata segmentsAndCommitMetadata =
driver.registerHandoff(published)
.get(HANDOFF_CONDITION_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
}
```
The error message is as follows:
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