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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