COSBench Tests Stop Abnormally

Symptom

COSBench tests stop as data failed the integrity check.

Key Process and Cause Analysis

COSBench tests stop as data MD5 validation failed.

Conclusion and Solution

1. View COSBench logs.

   vim /path/to/cosbench/archive/workload/workload.log

   It consists the following error message:

   [ERROR] [ErrorStatistics] - error code: N/A occurred 7 times, fail to operate: test4/myobjects59, test4/myobjects59, test4/myobjects1699, test1/myobjects2686, test3/myobjects10623, test4/myobjects10624, test1/myobjects26871
   com.amazonaws.AmazonClientException: Unable to verify integrity of data download. Client calculated content hash didn't match hash calculated by Amazon S3. The data may be corrupt.

2. Add the following to the Java command line in the /path/to/cosbench/cosbench-start.sh script to disable MD5 validation:

   -Dcom.amazonaws.services.s3.disableGetObjectMD5Validation=true

3. Restart all COSBench processes.