[CURATOR-663] ZooKeeperServerEmbeddedAdapter.configure might fail with ClassCastException

[jira-importer]

There might be a ClassCastException happening when starting the TestingZooKeeper instance. The following test reproduces the issue:

@Test
public void testTestingZooKeeperServer() throws Exception
{
  final Map<String, Object> customProperties = new HashMap<>();
  customProperties.put("maxSessionTimeout", 60_000);
final Path tmpDirPath = Files.createTempDirectory("tmp-");

final InstanceSpec instanceSpec = new InstanceSpec(tmpDirPath.toFile(), 0, 0, 0, true, 0, 10, 1, customProperties, "host-name");

final QuorumConfigBuilder quorumConfigBuilder = new QuorumConfigBuilder(instanceSpec);

final TestingZooKeeperServer zkServer = new TestingZooKeeperServer(quorumConfigBuilder);
zkServer.start();

}

The test above will fail with a ClassCastException because InstantSpec allows a Map 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. These Properties are then written to a temporary file in ZooKeeper's ZooKeeperServerEmbeddedImpl:58 which expects only to have String values. The previously set Integer value isn't converted to a String anywhere, though.

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Originally reported by mapohl, imported from: ZooKeeperServerEmbeddedAdapter.configure might fail with ClassCastException

• status: Open
• priority: Major
• resolution: Unresolved
• imported: 2025-01-21

[jira-importer]

tison:

Seems change the type of InstanceSpec#customProperties could resolve this?