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Hi,
I want to enable adaptivescheduler in hadoop 0.20.203.0. I have a jar file from this scheduler.(I am sure that this jar file works properly.).I put jar file in  HADOOP_HOME/lib and I set HADOOP_CLASSPATH in hadop-env.sh.and I set the required property of scheduler in mapred-site.xml. when I run my cluster, all of jobtracker,datanode,.... start. But when I go to UI of scheduler(http://localhost:50030/scheduler), I face with error 404. what should I do?please help me ....
 
my jobtracker log is:
2013-07-25 07:34:14,229 INFO org.apache.hadoop.mapred.JobTracker: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting JobTracker
STARTUP_MSG:   host = master/192.168.0.112
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 0.20.203.0
STARTUP_MSG:   build = http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-203 -r 1099333; compiled by 'oom' on Wed May  4 07:57:50 PDT 2011
************************************************************/
2013-07-25 07:34:14,317 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2013-07-25 07:34:14,326 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered.
2013-07-25 07:34:14,328 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
2013-07-25 07:34:14,328 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: JobTracker metrics system started
2013-07-25 07:34:14,545 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered.
2013-07-25 07:34:14,548WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists!
2013-07-25 07:34:14,550 INFO org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager: Updating the current master key for generating delegation tokens
2013-07-25 07:34:14,551 INFO org.apache.hadoop.mapred.JobTracker: Scheduler configured with (memSizeForMapSlotOnJT, memSizeForReduceSlotOnJT, limitMaxMemForMapTasks, limitMaxMemForReduceTasks) (-1, -1, -1, -1)
2013-07-25 07:34:14,552 INFO org.apache.hadoop.util.HostsFileReader: Refreshing hosts (include/exclude) list
2013-07-25 07:34:14,557 INFO org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager: Starting expired delegation token remover thread, tokenRemoverScanInterval=60 min(s)
2013-07-25 07:34:14,558 INFO org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager: Updating the current master key for generating delegation tokens
2013-07-25 07:34:14,629 INFO org.apache.hadoop.mapred.JobTracker: Starting jobtracker with owner as maedeh
2013-07-25 07:34:14,654 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source RpcDetailedActivityForPort9001 registered.
2013-07-25 07:34:14,654 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source RpcActivityForPort9001 registered.
2013-07-25 07:34:14,657 INFO org.apache.hadoop.ipc.Server: Starting SocketReader
2013-07-25 07:34:20,142 INFO org.mortbay.log: Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
2013-07-25 07:34:20,370 INFO org.apache.hadoop.http.HttpServer: Added global filtersafety (class=org.apache.hadoop.http.HttpServer$QuotingInputFilter)
2013-07-25 07:34:20,533 INFO org.apache.hadoop.http.HttpServer: Port returned by webServer.getConnectors()[0].getLocalPort() before open() is -1. Opening the listener on 50030
2013-07-25 07:34:20,535 INFO org.apache.hadoop.http.HttpServer: listener.getLocalPort() returned 50030 webServer.getConnectors()[0].getLocalPort() returned 50030
2013-07-25 07:34:20,535 INFO org.apache.hadoop.http.HttpServer: Jetty bound to port 50030
2013-07-25 07:34:20,535 INFO org.mortbay.log: jetty-6.1.x
2013-07-25 07:34:21,435 INFO org.mortbay.log: Started SelectChannelConnector@0.0.0.0:50030
2013-07-25 07:34:21,443 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm registered.
2013-07-25 07:34:21,443 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source JobTrackerMetrics registered.
2013-07-25 07:34:21,444 INFO org.apache.hadoop.mapred.JobTracker: JobTracker up at: 9001
2013-07-25 07:34:21,444 INFO org.apache.hadoop.mapred.JobTracker: JobTracker webserver: 50030
2013-07-25 07:34:25,330 INFO org.apache.hadoop.mapred.JobTracker: Cleaning up the system directory
2013-07-25 07:34:25,987 INFO org.apache.hadoop.mapred.JobHistory: Creating DONE folder at file:/home/maedeh/hadoop-0.20.203.0/logs/history/done
2013-07-25 07:34:25,999 INFO org.apache.hadoop.mapred.JobTracker: History server being initialized in embedded mode
2013-07-25 07:34:26,001 INFO org.apache.hadoop.mapred.JobHistoryServer: Started job history server at: localhost:50030
2013-07-25 07:34:26,001 INFO org.apache.hadoop.mapred.JobTracker: Job History Server web address: localhost:50030
2013-07-25 07:34:26,004 INFO org.apache.hadoop.mapred.CompletedJobStatusStore: Completed job store is inactive
2013-07-25 07:34:27,798 INFO org.apache.hadoop.mapred.AdaptiveScheduler: Successfully configured AdaptiveScheduler
2013-07-25 07:34:27,798 INFO org.apache.hadoop.mapred.JobTracker: Refreshing hosts information
2013-07-25 07:34:27,807 INFO org.apache.hadoop.util.HostsFileReader: Setting the includes file to
2013-07-25 07:34:27,807 INFO org.apache.hadoop.util.HostsFileReader: Setting the excludes file to
2013-07-25 07:34:27,807 INFO org.apache.hadoop.util.HostsFileReader: Refreshing hosts (include/exclude) list
2013-07-25 07:34:27,807 INFO org.apache.hadoop.mapred.JobTracker: Decommissioning 0 nodes
2013-07-25 07:34:27,809 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
2013-07-25 07:34:27,810 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 9001: starting
2013-07-25 07:34:27,810 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 9001: starting
2013-07-25 07:34:27,811 INFO org.apache.had