myeclipse下执行程序报错IO异常。hadoop查看也报错的解决。
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$ bin/hadoop fs -cat /tmp/wordcount/word.txt12/06/29 18:07:53 INFO hdfs.DFSClient: No node available for block: blk_-6169034246478912245_1004 file=/tmp/wordcount/word.txt12/06/29 18:07:53 INFO hdfs.DFSClient: Could not obtain block blk_-6169034246478912245_1004 from any node: java.io.IOException: No live nodes contain current block12/06/29 18:07:56 INFO hdfs.DFSClient: No node available for block: blk_-6169034246478912245_1004 file=/tmp/wordcount/word.txt12/06/29 18:07:56 INFO hdfs.DFSClient: Could not obtain block blk_-6169034246478912245_1004 from any node: java.io.IOException: No live nodes contain current block12/06/29 18:07:59 INFO hdfs.DFSClient: No node available for block: blk_-6169034246478912245_1004 file=/tmp/wordcount/word.txt12/06/29 18:07:59 INFO hdfs.DFSClient: Could not obtain block blk_-6169034246478912245_1004 from any node: java.io.IOException: No live nodes contain current block12/06/29 18:08:02 WARN hdfs.DFSClient: DFS Read: java.io.IOException: Could not obtain block: blk_-6169034246478912245_1004 file=/tmp/wordcount/word.txt at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1812) at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1638) at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1767) at java.io.DataInputStream.read(DataInputStream.java:83) at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:47) at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:85) at org.apache.hadoop.fs.FsShell.printToStdout(FsShell.java:114) at org.apache.hadoop.fs.FsShell.access$100(FsShell.java:49) at org.apache.hadoop.fs.FsShell$1.process(FsShell.java:352) at org.apache.hadoop.fs.FsShell$DelayedExceptionThrowing.globAndProcess(FsShell.java:1898) at org.apache.hadoop.fs.FsShell.cat(FsShell.java:346) at org.apache.hadoop.fs.FsShell.doall(FsShell.java:1543) at org.apache.hadoop.fs.FsShell.run(FsShell.java:1761) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at org.apache.hadoop.fs.FsShell.main(FsShell.java:1880)cat: Could not obtain block: blk_-6169034246478912245_1004 file=/tmp/wordcount/word.txt
解决方法:将hadoop关闭重启。
$ bin/stop-all.sh
$ bin/start-all.sh
$ bin/hadoop fs -ls /tmp/wordcount/
$ bin/hadoop fs -cat /tmp/wordcount/word.txt
这次就ok了。
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