apache/hadoop · error

Hadoop Pipes Exception: in ping %s\n

Error message

Hadoop Pipes Exception: in ping %s\n

What it means

Error "Hadoop Pipes Exception: in ping %s\n" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-pipes/src/main/native/pipes/impl/HadoopPipes.cc:1084

          sockaddr_in addr;
          addr.sin_family = AF_INET;
          addr.sin_port = htons(toInt(portStr));
          addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
          HADOOP_ASSERT(connect(sock, (sockaddr*) &addr, sizeof(addr)) == 0,
                        string("problem connecting command socket: ") +
                        strerror(errno));

        }
        if (sock != -1) {
          int result = shutdown(sock, SHUT_RDWR);
          HADOOP_ASSERT(result == 0, "problem shutting socket");
          result = close(sock);
          HADOOP_ASSERT(result == 0, "problem closing socket");
        }
        remaining_retries = MAX_RETRIES;
      } catch (Error& err) {
        if (!context->isDone()) {
          fprintf(stderr, "Hadoop Pipes Exception: in ping %s\n", 
                err.getMessage().c_str());
          remaining_retries -= 1;
          if (remaining_retries == 0) {
            exit(1);
          }
        } else {
          return NULL;
        }
      }
    }
    return NULL;
  }

  /**
   * Run the assigned task in the framework.
   * The user's main function should set the various functions using the 
   * set* functions above and then call this.
   * @return true, if the task succeeded.

View on GitHub (pinned to 2add963021)

Solutions

1. 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.

When it happens

Trigger: Hadoop Pipes C++ client receives an unexpected or invalid command during the ping exchange with the Java task process, indicating protocol desynchronization.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/f7df93fc59c83c57. Report an issue: GitHub.