Changes between Version 17 and Version 18 of jazz/DRBL_Hadoop

Timestamp:

Mar 20, 2009, 5:34:05 PM (15 years ago)

Author:

jazz

Comment:

--

jazz/DRBL_Hadoop

@@ -145 +145 @@
  * use "Wake on LAN" for DRBL clients
  * browse http://192.168.61.254:50070 for DFS status
+
+== Known Issue ==
+
+ * 如果要讓 DRBL Clients 都掛起硬碟來存資料，hadoop-site.xml 必須加入
+{{{
+  <property>
+    <name>dfs.data.dir</name>
+    <value>預採用的路徑(Ex:/home/jazz/hadoop)</value>
+    <final>true</final>
+  </property>
+}}}
+ * 記得 namenode 要 format 否則會無法連接上 namenode
+ * 有掛載硬碟時，當 datanode 第二次啟動，會出現錯誤訊息
+{{{
+2009-03-21 01:03:49,814 INFO org.apache.hadoop.dfs.Storage: Cannot lock storage /home/jazz/hadoop. The directory is already locked.
+2009-03-21 01:03:49,915 ERROR org.apache.hadoop.dfs.DataNode: java.io.IOException: Cannot lock storage /home/jazz/hadoop. The directory is already locked.
+        at org.apache.hadoop.dfs.Storage$StorageDirectory.lock(Storage.java:447)
+        at org.apache.hadoop.dfs.Storage$StorageDirectory.analyzeStorage(Storage.java:300)
+        at org.apache.hadoop.dfs.DataStorage.recoverTransitionRead(DataStorage.java:105)
+        at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:306)
+        at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:223)
+        at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:3071)
+        at org.apache.hadoop.dfs.DataNode.instantiateDataNode(DataNode.java:3026)
+        at org.apache.hadoop.dfs.DataNode.createDataNode(DataNode.java:3034)
+        at org.apache.hadoop.dfs.DataNode.main(DataNode.java:3156)
+
+2009-03-21 01:03:49,915 INFO org.apache.hadoop.dfs.DataNode: SHUTDOWN_MSG:
+/************************************************************
+SHUTDOWN_MSG: Shutting down DataNode at pc144/192.168.100.44
+************************************************************/
+}}}