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hdfs journalnode fail , Caused by: java.lang.RuntimeException: java.lang.NullPointerException

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cdh5.15

when I start journalnode, i get this. 

aw_0-1661852655878.png

cmf serverlog as:

aw_2-1661853895258.png

 

so I check heap values. Finally , I find Java Heap Size of JournalNode in Bytes is 0.

 

but  this value can not be set 0

aw_1-1661853804076.png

 

Why ? why?

 

 

 

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