{"record":{"id":"f7df93fc59c83c57","repo":"apache/hadoop","slug":"hadoop-pipes-exception-in-ping-s-n","errorCode":null,"errorMessage":"Hadoop Pipes Exception: in ping %s\\n","messagePattern":"Hadoop Pipes Exception: in ping (.+?)\\\\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"hadoop-tools/hadoop-pipes/src/main/native/pipes/impl/HadoopPipes.cc","lineNumber":1084,"sourceCode":"          sockaddr_in addr;\n          addr.sin_family = AF_INET;\n          addr.sin_port = htons(toInt(portStr));\n          addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);\n          HADOOP_ASSERT(connect(sock, (sockaddr*) &addr, sizeof(addr)) == 0,\n                        string(\"problem connecting command socket: \") +\n                        strerror(errno));\n\n        }\n        if (sock != -1) {\n          int result = shutdown(sock, SHUT_RDWR);\n          HADOOP_ASSERT(result == 0, \"problem shutting socket\");\n          result = close(sock);\n          HADOOP_ASSERT(result == 0, \"problem closing socket\");\n        }\n        remaining_retries = MAX_RETRIES;\n      } catch (Error& err) {\n        if (!context->isDone()) {\n          fprintf(stderr, \"Hadoop Pipes Exception: in ping %s\\n\", \n                err.getMessage().c_str());\n          remaining_retries -= 1;\n          if (remaining_retries == 0) {\n            exit(1);\n          }\n        } else {\n          return NULL;\n        }\n      }\n    }\n    return NULL;\n  }\n\n  /**\n   * Run the assigned task in the framework.\n   * The user's main function should set the various functions using the \n   * set* functions above and then call this.\n   * @return true, if the task succeeded.","sourceCodeStart":1066,"sourceCodeEnd":1102,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-tools/hadoop-pipes/src/main/native/pipes/impl/HadoopPipes.cc#L1066-L1102","documentation":"Error \"Hadoop Pipes Exception: in ping %s\\n\" thrown in apache/hadoop.","triggerScenarios":"Hadoop Pipes C++ client receives an unexpected or invalid command during the ping exchange with the Java task process, indicating protocol desynchronization.","commonSituations":"See trigger scenarios.","solutions":["Check the tasktracker/pipes protocol logs; the ping between the C++ pipes process and the JVM failed, usually because the child process or connection died."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"2add9630210752f88ceb1bb74eb65e37bf41da8e","analyzedAt":"2026-08-22T19:55:07.957Z","schemaVersion":2},"datasetVersion":"2026-08-23T01:17:44.959Z"}