Stefania created CASSANDRA-9561:
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Summary: Lifecycle unit tests fail when run in parallel
Key: CASSANDRA-9561
URL: https://issues.apache.org/jira/browse/CASSANDRA-9561
Project: Cassandra
Issue Type: Test
Reporter: Stefania
Assignee: Stefania
We had a new failure in TrackerTest:
http://cassci.datastax.com/view/trunk/job/trunk_testall/139/testReport/junit/org.apache.cassandra.db.lifecycle/TrackerTest/testDropSSTables/
{code}
14:02:05 [junit] Testcase:
testSSTablesInBounds(org.apache.cassandra.db.lifecycle.ViewTest): FAILED
14:02:05 [junit] 0(true) 1(false) expected:<1> but was:<2>
14:02:05 [junit] junit.framework.AssertionFailedError: 0(true) 1(false)
expected:<1> but was:<2>
14:02:05 [junit] at
org.apache.cassandra.db.lifecycle.ViewTest.testSSTablesInBounds(ViewTest.java:65)
14:02:05 [junit]
14:02:05 [junit]
14:02:05 [junit] Tests run: 7, Failures: 1, Errors: 0, Skipped: 0, Time
elapsed: 5.58 sec
14:02:05 [junit]
14:02:05 [junit] ------------- Standard Output ---------------
14:02:05 [junit] ERROR 13:57:36 Unable to delete /tmp/la-1-big-Data.db (it
will be removed on server restart; we'll also retry after GC)
14:02:05 [junit] ERROR 13:57:36 Unable to delete /tmp/la-1-big-Data.db (it
will be removed on server restart; we'll also retry after GC)
14:02:05 [junit] ERROR 13:57:36 Unable to delete /tmp/la-2-big-Data.db (it
will be removed on server restart; we'll also retry after GC)
14:02:05 [junit] ERROR 13:57:36 Unable to delete /tmp/la-2-big-Data.db (it
will be removed on server restart; we'll also retry after GC)
14:02:05 [junit] ERROR 13:57:36 Unable to delete /tmp/la-0-big-Data.db (it
will be removed on server restart; we'll also retry after GC)
14:02:05 [junit] ERROR 13:57:36 Unable to delete /tmp/la-0-big-Data.db (it
will be removed on server restart; we'll also retry after GC)
14:02:05 [junit] ------------- ---------------- ---------------
14:02:05 [junit] Testcase:
testDropSSTables(org.apache.cassandra.db.lifecycle.TrackerTest): FAILED
14:02:05 [junit] expected:<9> but was:<95>
14:02:05 [junit] junit.framework.AssertionFailedError: expected:<9> but
was:<95>
14:02:05 [junit] at
org.apache.cassandra.db.lifecycle.TrackerTest.testDropSSTables(TrackerTest.java:217)
14:02:05 [junit] at
org.apache.cassandra.db.lifecycle.TrackerTest.testDropSSTables(TrackerTest.java:192)
{code}
I could reproduce it easily but *only if running the tests in parallel*:
{code}
ant test -Dtest.runners=4 -Dtest.name=lifecycle/*Test
{code}
If running with a single JVM then no failures can be detected, not even after
50 runs in a loop.
I think the problem is a collision of file names for the sstables created by
MockSchema. When a JVM exits the file is deleted due to File.deleteOnExit(),
and the test running in a different JVM and using the same file name will fail.
This is the only explanation I could think of.
I propose to place sstable files created by MockSchema in folders unique to
each test by passing a namespace to MockSchema, equal to the test name.
cc [~benedict]
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