dosubot[bot] commented on issue #2712: URL: https://github.com/apache/incubator-hugegraph/issues/2712#issuecomment-2561557843
<!-- Answer --> The issue you're encountering seems to be related to the failure to properly close all transactions and release locks when deleting a graph in HugeGraph using RocksDB. This can prevent the recreation of a graph with the same name due to lingering locks. Here are some steps and considerations to address this issue: 1. **Ensure Proper Graph Closure**: Make sure that all transactions are closed before the graph is closed. The `close` method in `StandardHugeGraph` should ensure that all transactions are closed in all threads <sup>[[1]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/StandardHugeGraph.java)</sup>. 2. **Check for Open Transactions**: The error message indicates that there might be open transactions when the graph is being closed. Verify that all transactions are properly closed using the `closeTx` method, which checks if the transaction is open and closes it <sup>[[1]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/StandardHugeGraph.java)</sup>. 3. **Release Locks**: If the graph is not properly closed, the lock file in RocksDB might not be released. This can cause the "lock hold by current process" error. Ensure that the lock is released by properly shutting down the database session and deleting the lock file. 4. **Manual Lock File Deletion**: If the lock persists, you might need to manually delete the lock file located at `rocksdb-data/data/hugegraph2/m/LOCK`. Be cautious with this approach, as it can lead to data corruption if the database is still in use. 5. **Scheduled Cleanup**: HugeGraph uses a scheduled executor to clean up RocksDB data directories when a graph is deleted. Ensure that this process is functioning correctly to remove any lingering data or locks <sup>[[2]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-store/hg-store-rocksdb/src/main/java/org/apache/hugegraph/rocksdb/access/RocksDBFactory.java)</sup><sup>[[3]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-store/hg-store-core/src/main/java/org/apache/hugegraph/store/business/BusinessHandlerImpl.java)</sup>. By following these steps, you should be able to resolve the issue and recreate the graph with the same name. <!-- Dosu Comment Footer --> *To continue talking to [Dosu](https://dosu.dev), mention @dosu.* --- <sup>Help Dosu learn! Give it feedback: [Great Response](https://app.dosu.dev/response-feedback/74b9fe87-b180-4131-a535-8fa4666186b5?feedback_type=great_response) | [Irrelevant Answer](https://app.dosu.dev/response-feedback/74b9fe87-b180-4131-a535-8fa4666186b5?feedback_type=irrelevant_answer) | [Incorrect Sources](https://app.dosu.dev/response-feedback/74b9fe87-b180-4131-a535-8fa4666186b5?feedback_type=incorrect_sources) | [Too Verbose](https://app.dosu.dev/response-feedback/74b9fe87-b180-4131-a535-8fa4666186b5?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/74b9fe87-b180-4131-a535-8fa4666186b5?feedback_type=hallucination) | [Other](https://app.dosu.dev/response-feedback/74b9fe87-b180-4131-a535-8fa4666186b5?feedback_type=other)</sup> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
