Alexander Renz
614d4f5b38
- Added ClamAV security configuration to enhance scanning efficiency for critical file types. - Introduced deduplication optimization with a 1GB threshold to bypass SHA256 computation for large files, improving upload speed. - Resolved "endless encryption" issue by disabling deduplication for large files and allowing video file extensions in global settings. - Enhanced upload performance verification scripts to monitor and validate upload processes and configurations. - Updated monitoring scripts for real-time log analysis and upload activity tracking. - Documented all changes and configurations in respective markdown files for clarity and future reference.
118 lines
3.5 KiB
Markdown
118 lines
3.5 KiB
Markdown
# Upload Completion Issue - Diagnostic & Fix
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## Problem Analysis
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### User Report
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- ✅ **Upload starts correctly**: HMAC validation working
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- ✅ **Transfer completes**: File uploads without "endless encryption" delay
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- ❌ **Final step fails**: "Not found" error after upload completion
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### Root Cause Identified
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The issue occurs in the **final storage step**, specifically in the deduplication process:
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#### Deduplication Process Steps
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1. **File Upload**: ✅ Completes successfully
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2. **SHA256 Computation**: ✅ Working (now skipped for files >1GB)
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3. **File Movement**: ❌ `os.Rename()` and `os.Link()` operations failing
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4. **Hard Link Creation**: ❌ Causing "not found" response
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#### Technical Details
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```go
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// From helpers.go - Deduplication process
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if err := os.Rename(absFilename, existingPath); err != nil {
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log.Warnf("Failed to move file for deduplication: %v", err)
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return nil // Don't fail upload - BUT THIS MIGHT STILL CAUSE ISSUES
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}
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if err := os.Link(existingPath, absFilename); err != nil {
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log.Warnf("Failed to create link after deduplication: %v", err)
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// File restoration attempt may fail
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return nil
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}
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```
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## Fix Applied
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### Immediate Solution
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```bash
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# Temporarily disabled deduplication to isolate the issue
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deduplication_enabled = false
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```
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### Testing Strategy
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1. **Upload with deduplication disabled**: Should complete successfully
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2. **Monitor file storage**: Verify files appear in upload directory
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3. **Check for "not found" errors**: Should be eliminated
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4. **Confirm client success**: XMPP clients should show successful upload
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## Expected Results
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### Before Fix (with deduplication)
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```
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Upload Process:
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1. HMAC validation: ✅ Success
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2. File transfer: ✅ Success
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3. File created: ✅ Success
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4. Deduplication: ❌ Hard link failure
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5. Client response: ❌ "Not found"
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```
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### After Fix (deduplication disabled)
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```
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Upload Process:
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1. HMAC validation: ✅ Success
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2. File transfer: ✅ Success
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3. File stored directly: ✅ Success
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4. Deduplication: ⏭️ Skipped
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5. Client response: ✅ Success
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```
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## Long-term Solution Options
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### Option 1: Fix Deduplication Hard Links
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- Investigate NFS hard link limitations
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- Implement fallback to file copying instead of linking
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- Add better error handling for link failures
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### Option 2: Disable Deduplication for Large Files Only
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- Keep deduplication for small files (where it works)
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- Disable only for large files that were causing issues
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- Maintains storage efficiency for smaller files
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### Option 3: Alternative Deduplication Strategy
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- Use symbolic links instead of hard links
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- Implement reference counting system
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- Store deduplicated files in separate location
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## Monitoring & Verification
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### Test Script Created
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```bash
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/root/hmac-file-server/test_upload_completion.sh
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```
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### Real-time Monitoring
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- nginx access logs
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- HMAC server logs
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- Upload directory file creation
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- Client response verification
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## Current Status
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✅ **Deduplication disabled** to eliminate the storage failure
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✅ **Upload speed optimized** (1GB limit prevents SHA256 delays)
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✅ **Server running** with simplified storage process
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🔄 **Testing phase** to confirm fix resolves "not found" issue
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## Next Steps
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1. **Test upload completion** with current configuration
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2. **Verify client success** (no more "not found" errors)
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3. **Decide on long-term deduplication strategy** based on test results
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4. **Re-enable optimized deduplication** if hard link issues can be resolved
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---
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*Issue: Final storage step failing in deduplication process*
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*Fix: Deduplication temporarily disabled*
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*Status: Testing upload completion*
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