{"record":{"id":"23ce9bb12cfaa761","repo":"apache/iceberg","slug":"skipping-commit-for-table-task-a-dv-writer-23ce9b","errorCode":null,"errorMessage":"Skipping commit for table {} task {}: a DV writer reported an error.","messagePattern":"Skipping commit for table (.+?) task (.+?): a DV writer reported an error\\.","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"flink/v2.2/flink/src/main/java/org/apache/iceberg/flink/maintenance/operator/EqualityConvertCommitter.java","lineNumber":186,"sourceCode":"    // Emit Trigger for the Aggregator (even on error or no-op).\n    output.collect(new StreamRecord<>(Trigger.create(planResult.triggerTimestamp(), 0)));\n\n    bufferedResults.clear();\n    planResult = null;\n\n    super.processWatermark(mark);\n  }\n\n  @Override\n  public void close() throws Exception {\n    super.close();\n    tableLoader.close();\n  }\n\n  private void commitIfNeeded() {\n    for (DVWriteResult result : bufferedResults) {\n      if (result.isAbort()) {\n        LOG.warn(\n            \"Skipping commit for table {} task {}: a DV writer reported an error.\",\n            tableName,\n            taskName);\n        deleteUncommittedDVs();\n        return;\n      }\n    }\n\n    // No-op cycle: the planner emitted an empty plan result (see\n    // EqualityConvertPlanner.emitNoOpResult) because the next staging snapshot was filtered by\n    // shouldSkip or there was nothing new on staging. processWatermark still forwards a Trigger to\n    // TaskResultAggregator, so the maintenance task completes cleanly.\n    if (planResult.noOp()) {\n      return;\n    }\n\n    table.refresh();\n","sourceCodeStart":168,"sourceCodeEnd":204,"githubUrl":"https://github.com/apache/iceberg/blob/86d9c8fc543e7c56c9f624eb725f76c9baff9570/flink/v2.2/flink/src/main/java/org/apache/iceberg/flink/maintenance/operator/EqualityConvertCommitter.java#L168-L204","documentation":"This is a warning logged by the Flink maintenance service's EqualityConvertCommitter when a Deletion Vector (DV) writer task reported an abort. Instead of committing partially written DVs, the committer skips the commit and deletes uncommitted DV files to keep the table consistent. It is a deliberately defensive path: committing results from an aborted writer could publish corrupt or incomplete deletion vectors.","triggerScenarios":"Occurs in commitIfNeeded() (invoked from processWatermark) when the buffered DVWriteResult for a task has isAbort() == true, i.e. the DV writer subtask failed or was explicitly aborted before producing committable results.","commonSituations":"A DV writer subtask hit an I/O error on the underlying FileIO; the task was restarted/cancelled by Flink after checkpointing failed; a task failure triggered abort of in-flight results that still reached the committer's buffer.","solutions":["Inspect the TaskManager logs for the original DV writer failure (the abort cause) and fix that root cause first.","Verify the configured warehouse/FileIO credentials and filesystem availability for the table being maintained.","Re-run the maintenance/rewrite procedure after the failing task is fixed; no manual cleanup is needed since deleteUncommittedDVs() removes orphan files.","If aborts recur on restarts, check checkpoint configuration and whether the watermark triggers commit before writer results are complete."],"exampleFix":"// before: commit proceeds without checking writer health\ncommitter.commit(bufferedResults);\n// after: commitIfNeeded() already guards — ensure results are checked\nif (bufferedResults.stream().noneMatch(DVWriteResult::isAbort)) {\n  doCommit(bufferedResults);\n} else {\n  deleteUncommittedDVs();\n}","handlingStrategy":"retry","validationCode":"boolean committable = results != null && results.stream().noneMatch(DVWriteResult::isAbort);","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Monitor TaskManager logs for the underlying DV writer failure, not just this warning","Ensure checkpointing and restart strategies are configured so writer failures surface as job failures","Validate FileIO/storage credentials before launching maintenance jobs"],"tags":["flink","deletion-vectors","commit-skipped","maintenance"],"backgroundTag":"writer-aborted-commit-skipped","analyzedSha":"86d9c8fc543e7c56c9f624eb725f76c9baff9570","analyzedAt":"2026-09-12T00:46:39.097Z","contentChangedAt":"2026-09-12T00:46:39.097Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}