[HBASE-21568] Disable use of BlockCache for LoadIncrementalHFiles

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.2, 2.0.4
• Component/s: Client
• Hadoop Flags: Reviewed
• Assignee: Josh Elser
• Reporter: Josh Elser
• Created: 07/Dec/18 20:53
• Updated: 12/Dec/18 13:02
• Resolved: 11/Dec/18 18:19

Description

Vladimir Rodionov added some API to CacheConfig via HBASE-17151 to allow callers to specify that they do not want to use a block cache when reading an HFile.

If the BucketCache is set up to use the FileSystem, we can have a situation where the client tries to instantiate the BucketCache and is disallowed due to filesystem permissions:

2018-12-03 16:22:03,032 ERROR [LoadIncrementalHFiles-0] bucket.FileIOEngine: Failed allocating cache on /mnt/hbase/cache.data
java.io.FileNotFoundException: /mnt/hbase/cache.data (Permission denied)
  at java.io.RandomAccessFile.open0(Native Method)
  at java.io.RandomAccessFile.open(RandomAccessFile.java:316)
  at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)
  at java.io.RandomAccessFile.<init>(RandomAccessFile.java:124)
  at org.apache.hadoop.hbase.io.hfile.bucket.FileIOEngine.<init>(FileIOEngine.java:81)
  at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.getIOEngineFromName(BucketCache.java:382)
  at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.<init>(BucketCache.java:262)
  at org.apache.hadoop.hbase.io.hfile.CacheConfig.getBucketCache(CacheConfig.java:633)
  at org.apache.hadoop.hbase.io.hfile.CacheConfig.instantiateBlockCache(CacheConfig.java:663)
  at org.apache.hadoop.hbase.io.hfile.CacheConfig.<init>(CacheConfig.java:250)
  at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.groupOrSplit(LoadIncrementalHFiles.java:713)
  at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles$3.call(LoadIncrementalHFiles.java:621)
  at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles$3.call(LoadIncrementalHFiles.java:617)
  at java.util.concurrent.FutureTask.run(FutureTask.java:266)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  at java.lang.Thread.run(Thread.java:748)

LoadIncrementalHfiles should provide the CacheConfig.DISABLE.