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From "Olivier Michallat (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-11064) Failed aggregate creation breaks server permanently
Date Mon, 25 Jan 2016 14:05:40 GMT
Olivier Michallat created CASSANDRA-11064:
---------------------------------------------

             Summary: Failed aggregate creation breaks server permanently
                 Key: CASSANDRA-11064
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11064
             Project: Cassandra
          Issue Type: Bug
            Reporter: Olivier Michallat


While testing edge cases around aggregates, I tried the following to see if custom types were
supported:

{code}
ccm create v321 -v3.2.1 -n3
ccm updateconf enable_user_defined_functions:true
ccm start
ccm node1 cqlsh

CREATE FUNCTION id(i 'DynamicCompositeType(s => UTF8Type, i => Int32Type)')
RETURNS NULL ON NULL INPUT
RETURNS 'DynamicCompositeType(s => UTF8Type, i => Int32Type)'
LANGUAGE java
AS 'return i;';
// function created successfully

CREATE AGGREGATE ag()
SFUNC id
STYPE 'DynamicCompositeType(s => UTF8Type, i => Int32Type)'
INITCOND 's@foo:i@32';

ServerError: <ErrorMessage code=0000 [Server error] message="java.lang.RuntimeException:
java.util.concurrent.ExecutionException: org.apache.cassandra.exceptions.SyntaxException:
Failed parsing CQL term: [s@foo:i@32] reason: SyntaxException line 1:1 no viable alternative
at character '@'">{code}

Despite the error, the aggregate appears in system tables:
{code}
select * from system_schema.aggregates;
 keyspace_name | aggregate_name | ...
---------------+----------------+ ...
          test |             ag | ...
{code}

But you can't drop it, and trying to drop its function produces the server error again:
{code}
DROP AGGREGATE ag;
InvalidRequest: code=2200 [Invalid query] message="Cannot drop non existing aggregate 'test.ag'"

DROP FUNCTION id;
ServerError: <ErrorMessage code=0000 [Server error] message="java.lang.RuntimeException:
java.util.concurrent.ExecutionException: org.apache.cassandra.exceptions.SyntaxException:
Failed parsing CQL term: [s@foo:i@32] reason: SyntaxException line 1:1 no viable alternative
at character '@'">
{code}

What's worse, it's now impossible to restart the server:
{code}
ccm stop; ccm start

org.apache.cassandra.exceptions.SyntaxException: Failed parsing CQL term: [s@foo:i@32] reason:
SyntaxException line 1:1 no viable alternative at character '@'
	at org.apache.cassandra.cql3.CQLFragmentParser.parseAny(CQLFragmentParser.java:48)
	at org.apache.cassandra.cql3.Terms.asBytes(Terms.java:51)
	at org.apache.cassandra.schema.SchemaKeyspace.createUDAFromRow(SchemaKeyspace.java:1225)
	at org.apache.cassandra.schema.SchemaKeyspace.fetchUDAs(SchemaKeyspace.java:1204)
	at org.apache.cassandra.schema.SchemaKeyspace.fetchFunctions(SchemaKeyspace.java:1129)
	at org.apache.cassandra.schema.SchemaKeyspace.fetchKeyspace(SchemaKeyspace.java:897)
	at org.apache.cassandra.schema.SchemaKeyspace.fetchKeyspacesWithout(SchemaKeyspace.java:872)
	at org.apache.cassandra.schema.SchemaKeyspace.fetchNonSystemKeyspaces(SchemaKeyspace.java:860)
	at org.apache.cassandra.config.Schema.loadFromDisk(Schema.java:125)
	at org.apache.cassandra.config.Schema.loadFromDisk(Schema.java:115)
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:229)
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:551)
	at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:680)
{code}



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