Cloudera
CCA-500 · Question #10
Cluster Summary: 45 files and directories, 12 blocks = 57 total. Heap size is 15.31 MB/193.38MB(7%) Refer to the above screenshot. You configure a Hadoop cluster with seven DataNodes and on of your…
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Monitoring and Logging
Question
Cluster Summary:
45 files and directories, 12 blocks = 57 total. Heap size is 15.31 MB/193.38MB(7%) Refer to the above screenshot. You configure a Hadoop cluster with seven DataNodes and on of your monitoring UIs displays the details shown in the exhibit. What does the this tell you?
Exhibit
Options
- AThe DataNode JVM on one host is not active
- BBecause your under-replicated blocks count matches the Live Nodes, one node is dead, and your
- CYour cluster has lost all HDFS data which had bocks stored on the dead DatNode
- DThe HDFS cluster is in safe mode
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Topics
#DataNode monitoring#under-replicated blocks#cluster health#HDFS UI