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https://issues.apache.org/jira/browse/CASSANDRA-7801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14109317#comment-14109317
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Philip Thompson commented on CASSANDRA-7801:
--------------------------------------------
I'm able to reproduce his issue with the attached test on Windows 7 with C*
2.1.0-rc6. However, with the following similar test using the python driver, I
was not able to reproduce the issue:
{code}
def bug_7801_test(self):
session = self.prepare()
session.execute("CREATE TABLE IF NOT EXISTS users (userid text PRIMARY
KEY, name text)")
del_cmd = session.prepare("DELETE FROM users where userid='user1'")
ins = session.prepare("INSERT INTO users (userid, name) values
('user1', 'calle') IF NOT EXISTS")
get = session.prepare("SELECT * FROM users where userid='user1'")
for i in xrange(10000):
session.execute(del_cmd)
session.execute(ins)
rows = session.execute(get)
self.assertItemsEqual(rows[0], ['user1', 'calle'])
self.assertEqual(len(rows), 1)
{code}
> A successful INSERT with CAS does not always store data in the DB after a
> DELETE
> --------------------------------------------------------------------------------
>
> Key: CASSANDRA-7801
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7801
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: PC with Windows 7 and on Linux installation.
> Have seen the fault on Cassandra 2.0.9 and Cassandra 2.1.0-rc5
> Reporter: Martin Fransson
> Attachments: cas.zip
>
>
> When I run a loop with CQL statements to DELETE, INSERT with CAS and then a
> GET.
> The INSERT opertion is successful (Applied), but no data is stored in the
> database. I have checked the database manually after the test to verify that
> the DB is empty.
> for (int i = 0; i < 10000; ++i)
> {
> try
> {
> t.del();
> t.cas();
> t.select();
> }
> catch (Exception e)
> {
> System.err.println("i=" + i);
> e.printStackTrace();
> break;
> }
> }
> myCluster =
> Cluster.builder().addContactPoint("localhost").withPort(12742).build();
> mySession = myCluster.connect();
> mySession.execute("CREATE KEYSPACE IF NOT EXISTS castest WITH
> REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };");
> mySession.execute("CREATE TABLE IF NOT EXISTS castest.users (userid
> text PRIMARY KEY, name text)");
> myInsert = mySession.prepare("INSERT INTO castest.users (userid,
> name) values ('user1', 'calle') IF NOT EXISTS");
> myDelete = mySession.prepare("DELETE FROM castest.users where
> userid='user1'");
> myGet = mySession.prepare("SELECT * FROM castest.users where
> userid='user1'");
> }
> I can reproduce the fault with the attached program on a PC with windows 7.
> You need a cassandra runing and you need to set the port in the program.
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