hadoop - 无法使用“hdfs namenode importCheckpoint”导入新的 fsimage

Question

我有一个名称节点，其 fsimage 已损坏，我只有一个 fsimage 可用。我有一个具有可用检查点的辅助名称节点。现在，我想 importCheckpoint 到一个新目录。旧目录：cd /home/rakeshbharadwaj/Desktop/hadoop-2.7.4-ex2/nn 新目录：我已将 hdfs-site.xml 更改为/home/rakeshbharadwaj/Desktop/hadoop-2.7.4-ex2/new

我试图运行hdfs namenode importcheckPoint它给了我以下错误

19/02/26 12:38:51 INFO common.Storage: Lock on /home/rakeshbharadwaj/Desktop/hadoop-2.7.4-ex2/new/in_use.lock acquired by nodename 5270@rakeshbharadwaj-VirtualBox
19/02/26 12:38:51 INFO namenode.FSImage: Storage directory /home/rakeshbharadwaj/Desktop/hadoop-2.7.4-ex2/new is not formatted.
19/02/26 12:38:51 INFO namenode.FSImage: Formatting ...
19/02/26 12:38:51 INFO common.Storage: Lock on /tmp/hadoop-rakeshbharadwaj/dfs/namesecondary/in_use.lock acquired by nodename 5270@rakeshbharadwaj-VirtualBox
19/02/26 12:38:51 WARN namenode.FSNamesystem: Encountered exception loading fsimage
java.io.IOException: NameNode is not formatted.
    at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:235)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.doImportCheckpoint(FSImage.java:580)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:311)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:978)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:685)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:585)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:645)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:819)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:803)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1500)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1566)
19/02/26 12:38:51 INFO mortbay.log: Stopped HttpServer2$SelectChannelConnectorWithSafeStartup@0.0.0.0:50070

所以，我已经通过运行格式化了名称节点hdfs namenode -format。并且格式成功。格式化后形成一个新图像fsimage_0000000000000000000

现在，我hdfs namenode -importCheckpoint再次运行它，它给了我以下错误。

19/02/26 12:30:47 WARN namenode.FSNamesystem: Encountered exception loading fsimage
java.io.IOException: Cannot import image from a checkpoint.  NameNode already contains an image in /home/rakeshbharadwaj/Desktop/hadoop-2.7.4-ex2/n
    at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:392)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:225)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:978)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:685)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:585)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:645)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:819)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:803)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1500)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1566)

问题：我如何解决这个问题并从新目录中的检查点获取 fsimage。

标签： hadoophdfsnamenode