Hi, Apache Hadoop 0.20.205.
I'm trying to restart NN and it always hangs at the very beginning. The only logs I've got are: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = host/ip STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.205.0 STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-205 -r 1179940; compiled by 'hortonfo' on Fri Oct 7 06:20:32 UTC 2011 ************************************************************/ 2012-07-02 01:33:01,281 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2012-07-02 01:33:01,290 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered. 2012-07-02 01:33:01,292 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s). 2012-07-02 01:33:01,292 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system started 2012-07-02 01:33:01,434 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered. 2012-07-02 01:33:01,436 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists! 2012-07-02 01:33:01,441 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm registered. 2012-07-02 01:33:01,441 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source NameNode registered. 2012-07-02 01:33:01,463 INFO org.apache.hadoop.hdfs.util.GSet: VM type = 64-bit 2012-07-02 01:33:01,463 INFO org.apache.hadoop.hdfs.util.GSet: 2% max memory = 314.0275 MB 2012-07-02 01:33:01,463 INFO org.apache.hadoop.hdfs.util.GSet: capacity = 2^25 = 33554432 entries 2012-07-02 01:33:01,463 INFO org.apache.hadoop.hdfs.util.GSet: recommended=33554432, actual=33554432 2012-07-02 01:33:01,546 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: fsOwner=owner 2012-07-02 01:33:01,546 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: supergroup=supergroup 2012-07-02 01:33:01,546 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isPermissionEnabled=true 2012-07-02 01:33:01,550 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: dfs.block.invalidate.limit=100 2012-07-02 01:33:01,550 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s) 2012-07-02 01:33:01,787 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Registered FSNamesystemStateMBean and NameNodeMXBean 2012-07-02 01:33:01,802 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: Caching file names occuring more than 10 times 2012-07-02 01:33:01,811 INFO org.apache.hadoop.hdfs.server.common.Storage: Number of files = 17032 2012-07-02 01:33:02,406 INFO org.apache.hadoop.hdfs.server.common.Storage: Number of files under construction = 0 2012-07-02 01:33:02,406 INFO org.apache.hadoop.hdfs.server.common.Storage: Image file of size 2553316 loaded in 0 seconds. 2012-07-02 01:33:02,410 INFO org.apache.hadoop.hdfs.server.common.Storage: Edits file /apr/hdfs/name/current/edits of size 498 edits # 7 loaded in 0 seconds. ==================================== It hangs thereafter.... I wonder if anybody has seen this before? Some background: I shut down DFS and MR while there were still jobs running. Some MR jobs were hanging, so I manually killed the children JVMs after the shutdown. Not sure how such actions would affect NN startup. Any help would be appreciated. Thanks, James
