[jira] [Created] (CASSANDRA-9449) Running ALTER TABLE cql statement asynchronously results in failure

["Paul Praet (JIRA)" <ji...@apache.org>]

Paul Praet created CASSANDRA-9449:
-------------------------------------

             Summary: Running ALTER TABLE cql statement asynchronously results in failure
                 Key: CASSANDRA-9449
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9449
             Project: Cassandra
          Issue Type: Bug
         Environment: Singe cluster environment
            Reporter: Paul Praet


When running 'ALTER TABLE' cql statements asynchronously, we notice that often certain columns are missing, causing subsequent queries to fail.
The code snippet below can be used to reproduce the problem.

cassandra is a com.datastax.driver.core.Session reference.
We construct the table synchronously and then alter it (adding five columns) with the cassandra async API. We synchronize to ensure the table is properly altered before continuing. Preparing the statement at the bottom of the code snippet often fails:
{noformat} com.datastax.driver.core.exceptions.InvalidQueryException: Unknown identifier columnf {noformat}

{code}
 @Test
    public void testCassandraAsyncAlterTable() throws Exception {
        ResultSet rs = cassandra.execute("CREATE TABLE device ( columnA text, columnB text, columnC timestamp PRIMARY KEY ((columnA, columnB)));");

        List<ResultSetFuture> futures = new ArrayList<>();
        futures.add(cassandra.executeAsync("ALTER TABLE device ADD columnD text;"));
        futures.add(cassandra.executeAsync("ALTER TABLE device ADD columnE text;"));
        futures.add(cassandra.executeAsync("ALTER TABLE device ADD columnF text;"));
        futures.add(cassandra.executeAsync("ALTER TABLE device ADD columnG text;"));
        futures.add(cassandra.executeAsync("ALTER TABLE device ADD columnH text;"));

        for(ResultSetFuture resultfuture : futures){ resultfuture.get(); }
          
        /* discard the result; only interested to see if it works or not */
        cassandra.prepare("INSERT INTO device (columnA, columnB, columnC,columnD,columnE,columnF,columnG,columnH) VALUES (?,?,?,?,?,?,?,?);");

    }


{code}



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