imay commented on issue #1256: failed to initialize storage reader. 
tablet=322844.1094272791, res=-214, backend=10.90.239.23
URL: 
https://github.com/apache/incubator-doris/issues/1256#issuecomment-499062276
 
 
   No, this is not a fd leak. we have a cache for all open files. When we 
delete a file, for example when this file is compacted, we don't disable its FD 
cache. So you see a lot of FD opened for a deleted file. 
   
   After FD cache is full, default 30000, we will close unused FD, and these FD 
will be closed then.
   
   Of course, there is room for improvement. We can do this later

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