Use Weakly Connected Components to Avoid Cypher Query Crashing
Blog post from Neo4j
Maxime Guery's article discusses a solution for preventing Cypher query crashes by utilizing the Weakly Connected Components (WCC) algorithm from Neo4j's Graph Data Science plugin. This approach addresses common issues with concurrent transactions, such as deadlocks and missing nodes or relationships, which typically result in transaction rollbacks. By implementing the WCC algorithm, users can execute Cypher queries with concurrency without encountering these errors, optimizing complex refactoring and writing operations in large graphs. The article provides an example where the WCC algorithm significantly improves performance by allowing queries to be processed concurrently, demonstrating efficiency gains over traditional Cypher-only queries, particularly in large graphs. It highlights that while the solution is effective, it may not be applicable if the write operation cannot be split by communities or if there are no disjoint graphs, and transaction times may vary depending on the size of the communities involved.
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