There have been zero changes to my HLK test lab VMs between last week and this week. The driver that I’m testing has literally had nothing more than a one line change made to it with a ‘case’ being added to a ‘switch’ block. HLK tests of the previous build were 100% successful last week. HLK tests of the current build are now consistently failing just on Windows Server 2022 21H2 (build 10.0.20348) test clients, and only for the OpLocks tests.
I investigated the log files and noted something very weird regarding the error type & error code message being reported. The following is a copy & paste of the information from the .wtl viewer:
Title Result
Failed
Start Test 7/1/2026 5:40:34.045 AM HelperBreakLegacyL2
Error 7/1/2026 5:40:34.045 AM 08C.1694 : +VAR+SEV2 30 : HelperBreakLegacyL2
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:40:34.046 AM HelperBreakLegacyL2
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:42:41.139 AM HelperBreakEnhancedR
Error 7/1/2026 5:42:41.139 AM 08C.1694 : +VAR+SEV2 41 : HelperBreakEnhancedR
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:42:41.139 AM HelperBreakEnhancedR
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:45:12.311 AM HelperBreakLegacyL1
Error 7/1/2026 5:45:12.311 AM 08C.1694 : +VAR+SEV2 55 : HelperBreakLegacyL1
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:45:12.312 AM HelperBreakLegacyL1
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:47:35.553 AM HelperBreakEnhancedRW
Error 7/1/2026 5:47:35.553 AM 08C.1694 : +VAR+SEV2 66 : HelperBreakEnhancedRW
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:47:35.553 AM HelperBreakEnhancedRW
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:49:58.788 AM HelperBreakEnhancedRW
Error 7/1/2026 5:49:58.789 AM 08C.1694 : +VAR+SEV2 77 : HelperBreakEnhancedRW
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:49:58.789 AM HelperBreakEnhancedRW
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:52:57.535 AM HelperBreakEnhancedRH
Error 7/1/2026 5:52:57.535 AM 08C.1694 : +VAR+SEV2 86 : HelperBreakEnhancedRH
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:52:57.536 AM HelperBreakEnhancedRH
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:55:47.631 AM HelperBreakEnhancedRH
Error 7/1/2026 5:55:47.632 AM 08C.1694 : +VAR+SEV2 104 : HelperBreakEnhancedRH
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:55:47.632 AM HelperBreakEnhancedRH
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:57:10.604 AM HelperBreakLegacyBatch
Error 7/1/2026 5:57:10.604 AM 08C.1694 : +VAR+SEV2 123 : HelperBreakLegacyBatch
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:57:10.605 AM HelperBreakLegacyBatch
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 5:58:42.367 AM HelperBreakEnhancedRWH
Error 7/1/2026 5:58:42.367 AM 08C.1694 : +VAR+SEV2 133 : HelperBreakEnhancedRWH
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 5:58:42.368 AM HelperBreakEnhancedRWH
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
Failed
Start Test 7/1/2026 6:00:14.128 AM HelperBreakEnhancedRWH
Error 7/1/2026 6:00:14.128 AM 08C.1694 : +VAR+SEV2 143 : HelperBreakEnhancedRWH
File: base\fs\test\shared_libs\stresslog\loggersource\Logger.hxx Line: 283
Error Type:
Error Code: 0x0
Error Text: Error 0x00000000
End Test 7/1/2026 6:00:14.129 AM HelperBreakEnhancedRWH
Result: Fail
Repro: enhancedoplocks.exe -path i: -all /logpass /logfile FileOplocks-CNTFS.log
I’ve reformatted all of the volumes being used for the testing and ensured that they volume labels, drive letters, file system types, etc., all remain correct. Each test client VM has been rebooted. The error persists and is holding up getting a driver package code-signed by Microsoft.
The driver in question, although it’s technically a mini-filter, does not perform any file system filtering operations and functions purely as a process & thread event collector.
Has anybody else encountered this issue before? A search of existing postings didn’t appear to turn up anything similar and Google Search has not turned up anything helpful, either.