I get this error：
-bash-3.00$ ./bin/hadoop fsck /
Exception in thread "main" java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:193)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.Socket.connect(Socket.java:519)
at java.net.Socket.connect(Socket.java:469)
at sun.net.NetworkClient.doConnect(NetworkClient.java:157)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:382)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:509)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:231)
at sun.net.www.http.HttpClient.New(HttpClient.java:304)
at sun.net.www.http.HttpClient.New(HttpClient.java:316)
at
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:813)
at
sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:765)
at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:690)
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:934)
at org.apache.hadoop.dfs.DFSck.run(DFSck.java:116)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.hadoop.dfs.DFSck.main(DFSck.java:137)
Yi-Kai Tsai 写道:
hi Sriram
Run hadoop fsck / will give you summary of current HDFS status
including some useful information :
Minimally replicated blocks: 51224 (100.0 %)
Over-replicated blocks: 0 (0.0 %)
Under-replicated blocks: 0 (0.0 %)
Mis-replicated blocks: 7 (0.013665469 %)
Default replication factor: 3
Average block replication: 3.0
Missing replicas: 0 (0.0 %)
Number of data-nodes: 83
Number of racks: 6
Hi,
We have a cluster where we running HDFS in non-rack-aware mode. Now,
we want to switch HDFS to run in rack-aware mode. Apart from the
config changes (and restarting HDFS), to rackify the existing data, we
were thinking of increasing/decreasing replication level a few times
to get the data spread. Are there any tools that will enable us to
know when we are "done"?
Sriram
