Sam Lightfoot created CASSANDRA-21185:
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Summary: CLONE - Fix flaky DTest: bootstrap_test_*
Key: CASSANDRA-21185
URL: https://issues.apache.org/jira/browse/CASSANDRA-21185
Project: Apache Cassandra
Issue Type: Bug
Components: Test/dtest/python
Reporter: Sam Lightfoot
Assignee: Sam Lightfoot
Fix For: 5.1
Flakiness indicating more than 64MB of direct pool growth between stress tests
{code:java}
# Now run the full stack to warm up internal caches/pools
LARGE_COLUMN_SIZE = 1024 * 1024 * 63
self.stress_with_col_size(cluster, node1, LARGE_COLUMN_SIZE)
after1stLargeStress = self.directbytes(node1)
logger.info("After 1st large column stress, direct memory:
{0}".format(after1stLargeStress))
# Now run the full stack to see how much memory is allocated for the second
"large" columns request
self.stress_with_col_size(cluster, node1, LARGE_COLUMN_SIZE)
after2ndLargeStress = self.directbytes(node1)
logger.info("After 2nd large column stress, direct memory:
{0}".format(after2ndLargeStress))
# We may allocate direct memory proportional to size of a request
# but we want to ensure that when we do subsequent calls the used direct memory
is not growing
diff = int(after2ndLargeStress) - int(after1stLargeStress)
logger.info("Direct memory delta: {0}".format(diff))
assert diff < LARGE_COLUMN_SIZE {code}
[https://pre-ci.cassandra.apache.org/job/cassandra/410/testReport/junit/dtest.largecolumn_test/TestLargeColumn/Tests___dtest_jdk21_34_64___test_cleanup/history/]
{code:java}
assert 66073403 < 66060288 {code}
This could be a real issue - this amount of growth is unexpected.
Appears it may be isolated to JDK21:
*
[https://pre-ci.cassandra.apache.org/job/cassandra/412/testReport/junit/dtest.largecolumn_test/TestLargeColumn/Tests___dtest_jdk21_34_64___test_cleanup/]
*
[https://pre-ci.cassandra.apache.org/job/cassandra/410/testReport/junit/dtest.largecolumn_test/TestLargeColumn/Tests___dtest_jdk21_34_64___test_cleanup/]
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