{"record":{"id":"d8cdbeea24d66553","repo":"apache/flink","slug":"error-while-getting-the-file-registered-under-n","errorCode":null,"errorMessage":"Error while getting the file registered under '${name}' from the distributed cache","messagePattern":"Error while getting the file registered under '(.+?)' from the distributed cache","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"flink-core/src/main/java/org/apache/flink/api/common/cache/DistributedCache.java","lineNumber":164,"sourceCode":"        }\n\n        Future<Path> future = cacheCopyTasks.get(name);\n        if (future == null) {\n            throw new IllegalArgumentException(\n                    \"File with name '\"\n                            + name\n                            + \"' is not available.\"\n                            + \" Did you forget to register the file?\");\n        }\n\n        try {\n            final Path path = future.get();\n            URI tmp = path.makeQualified(path.getFileSystem()).toUri();\n            return new File(tmp);\n        } catch (ExecutionException e) {\n            throw new RuntimeException(\"An error occurred while copying the file.\", e.getCause());\n        } catch (Exception e) {\n            throw new RuntimeException(\n                    \"Error while getting the file registered under '\"\n                            + name\n                            + \"' from the distributed cache\",\n                    e);\n        }\n    }\n\n    // ------------------------------------------------------------------------\n    //  Utilities to read/write cache files from/to the configuration\n    // ------------------------------------------------------------------------\n\n    public static void writeFileInfoToConfig(\n            String name, DistributedCacheEntry e, Configuration conf) {\n        int num = conf.get(getIntConfigOption(CACHE_FILE_NUM), 0) + 1;\n        conf.set(getIntConfigOption(CACHE_FILE_NUM), num);\n        conf.setString(CACHE_FILE_NAME + num, name);\n        conf.setString(CACHE_FILE_PATH + num, e.filePath);\n        conf.set(","sourceCodeStart":146,"sourceCodeEnd":182,"githubUrl":"https://github.com/apache/flink/blob/2f3c205e9266cb30240eb7f4fdab15cad629a70f/flink-core/src/main/java/org/apache/flink/api/common/cache/DistributedCache.java#L146-L182","documentation":"Thrown by DistributedCache.getFile() when future.get() throws an exception that is NOT an ExecutionException — typically an InterruptedException. This means the calling thread was interrupted while waiting for the distributed-cache file copy to complete. The RuntimeException wraps the original exception and includes the name the file was registered under.","triggerScenarios":"RuntimeContext.getDistributedCache().getFile(name) is called and the thread is interrupted during Future.get(). This can happen during job cancellation, task failure, or when the runtime cancels running tasks.","commonSituations":"Job cancellation while a task is still copying cached files. A TaskManager slot preemption or timeout that interrupts the task thread. Heavy load causing the file copy to take longer than a thread-interrupt timeout.","solutions":["Check whether the job was cancelled or the task was concurrently failed — this exception is often a side effect of teardown, not the primary fault.","If using large cached files, pre-stage them or use a smaller file to reduce copy latency so the thread is less likely to be interrupted mid-copy.","Restore the interrupted status by calling Thread.currentThread().interrupt() in your catch block if you handle this exception, to respect Java interruption conventions.","Inspect the original exception (the 'e' parameter) for the true interruption source."],"exampleFix":"// before\nFile cached = getRuntimeContext().getDistributedCache().getFile(\"lookup\");\n\n// after — handle interruption gracefully\ntry {\n    File cached = getRuntimeContext().getDistributedCache().getFile(\"lookup\");\n} catch (RuntimeException e) {\n    if (e.getCause() instanceof InterruptedException) {\n        Thread.currentThread().interrupt();\n        log.warn(\"Interrupted while fetching distributed cache file 'lookup'\");\n        return;\n    }\n    throw e;\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n    File cachedFile = getRuntimeContext().getDistributedCache().getFile(\"myFile\");\n} catch (RuntimeException e) {\n    if (e.getCause() instanceof InterruptedException) {\n        Thread.currentThread().interrupt();\n        log.warn(\"Thread interrupted while fetching distributed cache file\");\n        return; // or handle gracefully\n    }\n    throw e;\n}","preventionTips":["Keep cached files small to reduce the window for interruption during copy.","Always restore interrupt status (Thread.currentThread().interrupt()) if you catch InterruptedException.","Check job health and cancellation signals if this occurs frequently — it may indicate systemic cancellation."],"tags":["distributed-cache","interruption","concurrency","taskmanager"],"backgroundTag":null,"analyzedSha":"2f3c205e9266cb30240eb7f4fdab15cad629a70f","analyzedAt":"2026-08-14T08:48:24.518Z","schemaVersion":2},"datasetVersion":"2026-08-14T10:17:34.591Z"}