apache/beam · error · RuntimeException

Failed trying to process extra files.

Error message

Failed trying to process extra files.

What it means

The outermost IOException catch in FileAwareFactoryFn.apply(). It wraps any IOException raised while iterating/processing the extra files directory itself (as opposed to a single key's value). The original IOException is chained as the cause.

Source

Thrown at sdks/java/extensions/kafka-factories/src/main/java/org/apache/beam/sdk/extensions/kafka/factories/FileAwareFactoryFn.java:155

                  matcher.appendReplacement(sb, Matcher.quoteReplacement(processedSecret));
                } catch (IllegalArgumentException ia) {
                  throw new IllegalArgumentException("Failed to get secret.", ia);
                }
              } else if (secretFile != null) {
                throw new UnsupportedOperationException("Not yet implemented.");
              }
            }
            matcher.appendTail(sb);
            String processedValue = sb.toString();
            processedConfig.put(key, processedValue);
          }
        } catch (IOException ex) {
          throw new RuntimeException("Failed trying to process value for key " + key + ".", ex);
        }
      }
    } catch (IOException e) {
      throw new RuntimeException("Failed trying to process extra files.", e);
    }

    return createObject(processedConfig);
  }

  /**
   * A function to download files from their specified external storage path and copy them to the
   * provided local filepath. The local filepath is provided by the replacePathWithLocal.
   *
   * @param externalFilePath
   * @param outputFileString
   * @return
   * @throws IOException
   */
  protected static synchronized String downloadExternalFile(
      String externalFilePath, String outputFileString) throws IOException {
    // create the file only if it doesn't exist
    if (new File(outputFileString).exists()) {

View on GitHub (pinned to 12126d8942)

Solutions

1. Inspect the chained cause for the concrete path that failed
2. Confirm extra files were actually staged and unpacked on the worker (check --filesToStage / worker logs)
3. Verify DIRECTORY_PREFIX-derived staging directory exists and is readable for the factory type
4. Retry the pipeline; transient distributed-filesystem failures often resolve on rerun

Example fix

// before
--filesToStage=old-extras/
// after
--filesToStage=/correct/path/extra-files/  # verified to contain the referenced files

java
// verify extras directory exists and is readable on workers before pipeline start
FileSystems.match("gs://my-bucket/extra-files/*");

java
try {
  factoryFn.apply(config);
} catch (RuntimeException ex) {
  if ("Failed trying to process extra files.".equals(ex.getMessage())) {
    log.severe("Extra files processing failed: " + ex.getCause());
  }
}

When it happens

Trigger: IOException while opening or walking the extra-files directory that backs the factory config — e.g. the staged directory can't be opened or a contained file's stream fails outside the per-key handler.

Common situations: Worker image missing the staged extras directory; corrupted staged bundle; filesystem transient failure; misconfigured directory prefix for the factory type.

Understand the failure class

Background: "failed to read file", EACCES, ENOENT and "could not read <path>" errors: when a program can't read a file from disk — this error's family across 49 libraries.

Related errors

• Failed trying to process value for key %s.
• No block has been successfully read from " + getCurrentSourc
• Un-globbable filesystem.
• Read-only filesystem.
• Unsupported compression type: " + compression

AI-assisted analysis of apache/beam@12126d8942 (2026-09-13). Data as JSON: /api/errors/f74aeff7936a99dd. Report an issue: GitHub.