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From Ahmad Shahzad <ashahz...@gmail.com>
Subject What is it??? help required
Date Sat, 03 Jul 2010 18:21:10 GMT
Hi ALL,
           I wanted to ask a few questions regarding the log of TaskTracker.

1) What is the purpose of the HttpServer that is started at port 50060, and
jetty bounded to it.
2) What is the purpose of the TaskTracker that is started at localhost and
port 42641.

Here is the log:
================================

2010-07-03 20:14:55,726 INFO org.mortbay.log: Logging to
org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via
org.mortbay.log.Slf4jLog
2010-07-03 20:14:57,652 INFO org.apache.hadoop.http.HttpServer: Port
returned by webServer.getConnectors()[0].getLocalPort() before open() is -1.
Opening the listener$
2010-07-03 20:14:57,733 INFO org.apache.hadoop.http.HttpServer:
listener.getLocalPort() returned 50060
webServer.getConnectors()[0].getLocalPort() returned 50060
2010-07-03 20:14:57,733 INFO org.apache.hadoop.http.HttpServer: Jetty bound
to port 50060
2010-07-03 20:14:57,734 INFO org.mortbay.log: jetty-6.1.14
2010-07-03 20:15:12,829 INFO org.mortbay.log: Started
SelectChannelConnector@0.0.0.0:50060
2010-07-03 20:15:12,846 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
Initializing JVM Metrics with processName=TaskTracker, sessionId=
2010-07-03 20:15:12,886 INFO org.apache.hadoop.ipc.metrics.RpcMetrics:
Initializing RPC Metrics with hostName=TaskTracker, port=42641
2010-07-03 20:15:13,062 INFO org.apache.hadoop.ipc.Server: IPC Server
Responder: starting
2010-07-03 20:15:13,064 INFO org.apache.hadoop.ipc.Server: IPC Server
listener on 42641: starting
2010-07-03 20:15:13,068 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 0 on 42641: starting
2010-07-03 20:15:13,069 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 1 on 42641: starting
2010-07-03 20:15:13,071 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 2 on 42641: starting
2010-07-03 20:15:13,072 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 3 on 42641: starting
2010-07-03 20:15:13,072 INFO org.apache.hadoop.mapred.TaskTracker:
TaskTracker up at: localhost/127.0.0.1:42641
2010-07-03 20:15:13,072 INFO org.apache.hadoop.mapred.TaskTracker: Starting
tracker tracker_master:localhost/127.0.0.1:42641

================================

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