apache/flink · error · IllegalStateException

Invalid value for IsTruncated field: {}

Error message

Invalid value for IsTruncated field: {}

What it means

Error "Invalid value for IsTruncated field: {}" thrown in apache/flink.

Source

Thrown at flink-filesystems/flink-s3-fs-base/src/main/java/com/amazonaws/services/s3/model/transform/XmlResponsesSaxParser.java:676

                    objectListing.setMaxKeys(parseInt(getText()));

                } else if (name.equals("Delimiter")) {
                    objectListing.setDelimiter(
                            decodeIfSpecified(
                                    checkForEmptyString(getText()), shouldSDKDecodeResponse));

                } else if (name.equals("EncodingType")) {
                    objectListing.setEncodingType(
                            shouldSDKDecodeResponse ? null : checkForEmptyString(getText()));
                } else if (name.equals("IsTruncated")) {
                    String isTruncatedStr = StringUtils.lowerCase(getText());

                    if (isTruncatedStr.startsWith("false")) {
                        objectListing.setTruncated(false);
                    } else if (isTruncatedStr.startsWith("true")) {
                        objectListing.setTruncated(true);
                    } else {
                        throw new IllegalStateException(
                                "Invalid value for IsTruncated field: " + isTruncatedStr);
                    }

                } else if (name.equals("Contents")) {
                    objectListing.getObjectSummaries().add(currentObject);
                    currentObject = null;
                }
            } else if (in("ListBucketResult", "Contents")) {
                if (name.equals("Key")) {
                    lastKey = getText();
                    currentObject.setKey(decodeIfSpecified(lastKey, shouldSDKDecodeResponse));
                } else if (name.equals("LastModified")) {
                    currentObject.setLastModified(ServiceUtils.parseIso8601Date(getText()));

                } else if (name.equals("ETag")) {
                    currentObject.setETag(ServiceUtils.removeQuotes(getText()));

                } else if (name.equals("Size")) {

View on GitHub (pinned to 2f3c205e92)

Solutions

1. Address the cause reported by the error message: Invalid value for IsTruncated field: the reported value
2. Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry.

Example fix

Correct the condition described ("Invalid value for IsTruncated field: the reported value") and rerun the job or command.

When it happens

Trigger: Triggered at runtime when the operation fails because: Invalid value for IsTruncated field: the reported value.

Common situations: Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: Invalid value for IsTruncated field: the reported value.

AI-assisted analysis of apache/flink@2f3c205e92 (2026-08-14). Data as JSON: /api/errors/784983b97f7d3fa6. Report an issue: GitHub.