Matthias Pohl created CURATOR-663:
-------------------------------------
Summary: ZooKeeperServerEmbeddedAdapter.configure might fail with
ClassCastException
Key: CURATOR-663
URL: https://issues.apache.org/jira/browse/CURATOR-663
Project: Apache Curator
Issue Type: Bug
Components: Framework
Affects Versions: 5.4.0
Reporter: Matthias Pohl
There might be a {{ClassCastException}} happening when starting the
{{TestingZooKeeper}} instance. The following test reproduces the issue:
{code}
@Test
public void testTestingZooKeeperServer() throws Exception
{
final Map<String, Object> customProperties = new HashMap<>();
customProperties.put("maxSessionTimeout", 60_000);
final InstanceSpec instanceSpec = new InstanceSpec(
zkTmpDir,
0,
0,
0,
true,
0,
10,
1,
customProperties,
"host-name");
final QuorumConfigBuilder quorumConfigBuilder = new
QuorumConfigBuilder(instanceSpec);
final TestingZooKeeperServer zkServer = new
TestingZooKeeperServer(quorumConfigBuilder);
zkServer.start();
}
{code}
The test above will fail with a {{ClassCastException}} because {{InstantSpec}}
allows a {{Map<String, Object>}} for custom properties, i.e. a non-String value
like Integer can be used.
This {{Map}} is then passed over into a {{Properties}} instance in
[QuorumConfigBuilder:163|https://github.com/apache/curator/blob/master/curator-test/src/main/java/org/apache/curator/test/QuorumConfigBuilder.java#L163].
These {{Properties}} are then written to a temporary file in ZooKeeper's
[ZooKeeperServerEmbeddedImpl:58|https://github.com/apache/zookeeper/blob/master/zookeeper-server/src/main/java/org/apache/zookeeper/server/embedded/ZooKeeperServerEmbeddedImpl.java#L58]
which expects only to have String values. The previously set Integer value
isn't converted to a String anywhere, though.
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