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Waiting for dfs to exit safe mode...

2012.10.15

1、啟動Hbase之前盡量關(guān)閉Hadoop的HDFS的安全模式，未關(guān)閉可能會造成Hbase在HDFS上創(chuàng)建文件不成功，日志記錄中也會出現(xiàn)如下記錄：

2012-04-10 21:37:01,999 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:37:12,003 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:37:22,006 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:37:32,011 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:37:42,014 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:37:52,019 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:38:02,022 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:38:12,029 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:38:22,032 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...
2012-04-10 21:38:32,036 INFO org.apache.hadoop.hbase.util.FSUtils: Waiting for dfs to exit safe mode...

解決方法：使用 hadoop dfsadmin -safemode leave 命令使Hadoop退出安全模式。

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