1、jobtracker启动不正常报错、hdfs无法使用(比如执行一个操作文件命令就报错:only be replicated to 0 nodes, instead of 1)
2012-07-23 00:00:05,244 WARN org.apache.hadoop.mapred.JobTracker: Retrying...2 2012-07-23 00:00:05,266 WARN org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception: java.io.IOException: File /tmp/hadoop-root/mapred/system/jobtracker.info cou ld only be replicated to 0 nodes, instead of 1
2012-07-23 00:00:05,267 WARN org.apache.hadoop.mapred.JobTracker: Writing to file hdfs://127.0.0.1:9000/tmp/hadoop-root/mapred/system/jobtracker.info failed!
30 2012-07-23 00:00:05,268 WARN org.apache.hadoop.mapred.JobTracker: FileSystem is not ready yet!
31 2012-07-23 00:00:05,271 WARN org.apache.hadoop.mapred.JobTracker: Failed to initialize recovery manager.
我的问题分析:当时也在网上找解决办法,有人就这个