I have a single machine that I use to test various things
with hadoop. I
am having errors in one of the log files that make no
particular sense.
This is hadoop 0.15.0
2007-12-04 16:51:28,405 ERROR
org.apache.hadoop.dfs.NameNode.Secondary:
Exception in doCheckpoint:
2007-12-04 16:51:28,406 ERROR
org.apache.hadoop.dfs.NameNode.Secondary:
java.net.UnknownHostException: hdfs
at
java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
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:394)
at
sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
at
sun.net.www.http.HttpClient.<init>(HttpClient.java:233
)
at sun.net.www.http.HttpClient.New(HttpClient.java:306)
at sun.net.www.http.HttpClient.New(HttpClient.java:323)
at
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient
(HttpURLConnection.java:788)
at
sun.net.www.protocol.http.HttpURLConnection.plainConnect(Htt
pURLConnection.java:729)
at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLC
onnection.java:654)
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(H
ttpURLConnection.java:977)
at
org.apache.hadoop.dfs.TransferFsImage.getFileClient(Transfer
FsImage.java:142)
at
org.apache.hadoop.dfs.TransferFsImage.getFileClient(Transfer
FsImage.java:181)
at
org.apache.hadoop.dfs.SecondaryNameNode.getFSImage(Secondary
NameNode.java:209)
at
org.apache.hadoop.dfs.SecondaryNameNode.doCheckpoint(Seconda
ryNameNode.java:275)
at
org.apache.hadoop.dfs.SecondaryNameNode.run(SecondaryNameNod
e.java:192)
at java.lang.Thread.run(Thread.java:619)
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