Reidddddd commented on a change in pull request #528: HBASE-22890 Verify the
files when RegionServer is starting and BucketCache is in file mode
URL: https://github.com/apache/hbase/pull/528#discussion_r319349466
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java
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@@ -1056,6 +1069,7 @@ private void retrieveFromFile(int[] bucketSizes) throws
IOException, BucketAlloc
"Attempt to restore non-persistent cache mappings!");
fis = new FileInputStream(persistencePath);
ois = new ObjectInputStream(fis);
+ ois.readUTF();
Review comment:
It breaks backward compatibility. For an upgrading rs, it should read an old
persistent file.
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