合并后无法向SVN提交Jar文件：报502 'Bad Gateway'错误求助

Let's break down your issue: you merged your test branch with the build branch to update JAR files, but now you can't commit the test branch—getting a 502 Bad Gateway error. Oddly, deleting the old JAR works, but uploading the new one fails, and the error points to the build branch instead of the test branch. Here's how to fix this step by step:

1. Check VisualSVN Server's File Size Limits #

Large binary files like JARs often trigger size-related blocks.

• Open VisualSVN Server Manager, right-click your repo, go to Properties > General.
• Look for the Maximum file size setting. If your new JAR is bigger than this value, either increase it or set it to 0 (unlimited).
• If you're using IIS as a reverse proxy for VisualSVN, check IIS's requestFiltering settings—make sure maxAllowedContentLength is large enough to accommodate the new JAR.

2. Audit the Build Branch's Server-Side Status #

Since the error points to the build branch, there might be issues with its state or permissions:

• Verify permissions: Ensure the user committing the test branch has read access to the build branch (merge operations require pulling content from the build branch, so missing read permissions can cause weird gateway errors).
• Check for locks or stuck transactions: Run svnadmin lslocks C:\Path\To\Your\Repo in the server's command line to see if any files in the build branch are locked. Use svnadmin unlock to clear invalid locks.
• Validate repo integrity: Run svnadmin verify C:\Path\To\Your\Repo to check for corruption in the build branch. If issues are found, use svnadmin recover to fix them.

3. Tweak TortoiseSVN's Commit Settings #

Sometimes the GUI client's default settings can cause timeouts for large file uploads:

• Open TortoiseSVN Settings > Network, and increase the HTTP timeout (try setting it to 300 seconds—5 minutes—to give the file enough time to upload).
• Try committing the new JAR via command line to rule out GUI glitches:

  svn commit -m "Update to new JAR version" path/to/your/new.jar
  

• Clean up your local working copy: Right-click the test branch folder > TortoiseSVN > Clean Up, and check both "Clean up working copy status" and "Break locks" to resolve any local state issues.

4. Inspect Network & Gateway Configurations #

If your VisualSVN server sits behind a reverse proxy (Nginx, IIS, etc.), the 502 error is likely coming from the proxy timing out:

• For Nginx: Adjust proxy_connect_timeout, proxy_send_timeout, and proxy_read_timeout in your server config to longer values (e.g., 300s).
• For IIS: Go to your application pool settings, increase the Idle Time-out and Connection Time-out values.
• Test direct connection: Try connecting to the VisualSVN server's direct port (usually 443 for HTTPS) instead of going through the proxy. If the commit works, the proxy is the culprit.

If none of these steps resolve the issue, dig into the VisualSVN server logs (default path: C:\Program Files\VisualSVN Server\logs)—the log entries will give you specific details about why the gateway error is happening, which can point you to the exact fix.

内容的提问来源于stack exchange，提问作者Ivana