J.Andreina created HDFS-3457:
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Summary: Number of UnderReplicated blocks and Number of Files in
the cluster, displayed in UI and Fsck report is different
Key: HDFS-3457
URL: https://issues.apache.org/jira/browse/HDFS-3457
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.0.0
Reporter: J.Andreina
Priority: Minor
Scenario:
=========
Write an HDFS application with the following sequence of operations
1. Create file.
2. Append and sync file.
3. Delete file.
4. Create file.
5. Rename file.
Run the application using 50 threads for 4 hours.
Next Run the same application using 200 threads for the next 4 hours.
Next Run the application using 50 threads for the next 4 hours.
The Number of under-Replicated blocks and Total number of files mentioned in
the UI and fsck report differs
Fsck report for the mismatch in Number of under-Replicated blocks :
===================================================================
Status: HEALTHY
Total size: 5670200922 B
Total dirs: 2
Total files: 2015
Total blocks (validated): 977 (avg. block size 5803685 B)
Minimally replicated blocks: 977 (100.0 %)
Over-replicated blocks: 0 (0.0 %)
Under-replicated blocks: 94 (9.621289 %)
Mis-replicated blocks: 0 (0.0 %)
Default replication factor: 2
Average block replication: 1.9037871
Corrupt blocks: 0
Missing replicas: 94 (5.0537634 %)
Number of data-nodes: 3
Number of racks: 1
FSCK ended at Mon Mar 19 11:14:41 IST 2012 in 94 milliseconds
The filesystem under path '/' is HEALTHY
Fsck report for the mismatch in Total number of Files :
=======================================================
Status: HEALTHY
Total size: 19418 B (Total open files size: 42729325 B)
Total dirs: 2
Total files: 4226 (Files currently being written: 15)
Total blocks (validated): 266 (avg. block size 73 B) (Total open file
blocks (not validated): 5)
Minimally replicated blocks: 266 (100.0 %)
Over-replicated blocks: 0 (0.0 %)
Under-replicated blocks: 0 (0.0 %)
Mis-replicated blocks: 0 (0.0 %)
Default replication factor: 2
Average block replication: 2.0
Corrupt blocks: 0
Missing replicas: 0 (0.0 %)
Number of data-nodes: 3
Number of racks: 2
FSCK ended at Wed Apr 04 10:41:44 IST 2012 in 2302 milliseconds
The filesystem under path '/' is HEALTHY
Have attached UI screenshot for both the issues
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