{"record":{"id":"ea1a657a4394040e","repo":"apache/seatunnel","slug":"failed-to-read-error-stream-from-firebase-http-con","errorCode":null,"errorMessage":"Failed to read error stream from Firebase HTTP connection","messagePattern":"Failed to read error stream from Firebase HTTP connection","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"seatunnel-connectors-v2/connector-firebase/src/main/java/org/apache/seatunnel/connectors/seatunnel/firebase/client/FirebaseHttpClient.java","lineNumber":261,"sourceCode":"            StringBuilder builder = new StringBuilder();\n            char[] buffer = new char[1024];\n            int bytesRead;\n            int totalRead = 0;\n            while ((bytesRead =\n                            reader.read(\n                                    buffer,\n                                    0,\n                                    Math.min(buffer.length, MAX_ERROR_BODY_BYTES - totalRead)))\n                    != -1) {\n                builder.append(buffer, 0, bytesRead);\n                totalRead += bytesRead;\n                if (totalRead >= MAX_ERROR_BODY_BYTES) {\n                    break;\n                }\n            }\n            return builder.toString().trim();\n        } catch (IOException e) {\n            log.warn(\"Failed to read error stream from Firebase HTTP connection\", e);\n            return \"\";\n        }\n    }\n\n    /** Retrieves or refreshes OAuth 2.0 access token safely. */\n    private synchronized String getAccessToken() throws IOException {\n        tokenLock.lock();\n        try {\n            AccessToken token = credentials.getAccessToken();\n            if (token == null\n                    || token.getExpirationTime() == null\n                    || token.getExpirationTime().getTime() <= System.currentTimeMillis() + 60000) {\n                credentials.refresh();\n                token = credentials.getAccessToken();\n            }\n            return token.getTokenValue();\n        } finally {\n            tokenLock.unlock();","sourceCodeStart":243,"sourceCodeEnd":279,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-connectors-v2/connector-firebase/src/main/java/org/apache/seatunnel/connectors/seatunnel/firebase/client/FirebaseHttpClient.java#L243-L279","documentation":"FirebaseHttpClient.readErrorStream reads the HTTP error body from a failed Firebase connection (bounded by MAX_ERROR_BODY_BYTES); if reading the stream throws an IOException, this warning is logged and an empty string is returned so the caller can still build an error from whatever is available. The original HTTP error will then surface without its body detail.","triggerScenarios":"rawErrorBody -> readErrorStream on an HttpURLConnection's error stream when the server closed the connection mid-body, the stream is already consumed, or a network interruption occurs while reading the error payload.","commonSituations":"Firebase/Google endpoints returning truncated error responses; TLS or proxy interception killing the stream; timeouts on error responses; retry storms producing connection resets.","solutions":["Check the primary HTTP error/status handling — the empty error body is secondary","Retry the request; transient resets usually disappear","Verify proxy/firewall/TLS settings between the client and Firebase endpoints","Increase read timeout on the HTTP connection if large error bodies are truncated"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":"// Guard before reading the error stream\nURLConnection conn = ...;\nif (conn == null) return \"\";\nInputStream err = ((HttpURLConnection) conn).getErrorStream();\nif (err == null) return \"\"; // no error body available","typeGuard":null,"tryCatchPattern":"try { body = readErrorStream(conn); } catch (IOException e) { body = \"\"; } // then build the error message with HTTP status even when body is empty","preventionTips":["Always null-check getErrorStream() before reading","Bound error-body reads (as done with MAX_ERROR_BODY_BYTES) and set sane read timeouts","Retry transient resets; surface HTTP status even when the body is unreadable"],"tags":["firebase","http","io","error-stream"],"backgroundTag":"empty-response-body","analyzedSha":"cf67b549a7a6c35fa0beb12d83c62892427ea919","analyzedAt":"2026-09-10T21:44:55.265Z","contentChangedAt":"2026-09-10T21:44:55.265Z","schemaVersion":2},"datasetVersion":"2026-09-14T11:17:12.474Z"}