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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-9449) Running ALTER TABLE cql statement asynchronously results in failure
Date Thu, 04 Jun 2015 12:09:38 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksey Yeschenko resolved CASSANDRA-9449.
------------------------------------------
    Resolution: Duplicate

> 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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