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FAQ

This document lists some common issues and their solutions. If you have problems when setting the environment, please check if it is mentioned in this document.

1. BrokenPipeError: [Errno 32] Broken pipe in language_server.py

Problem Description

When running a script (e.g., main/generate_test.py), you may encounter the following traceback:

File "yourpath/DTester/LSPs/language_server.py", line 91, in initialize
self._send_notification("initialized")
File "yourpath/DTester/LSPs/language_server.py", line 450, in _send_notification
self._send_to_process(notification)
File "yourpath/DTester/LSPs/language_server.py", line 431, in _send_to_process
self.process.stdin.write(f"Content-Length: {len(message)}\r\n\r\n{message}")
BrokenPipeError: [Errno 32] Broken pipe

This indicates that the LSP server (jdtls) process crashed or failed to start, causing the pipe (STDIN) to break, and the Python client couldn't write data to it.

Solutions

  1. Make sure your jdk version is jdk21+

    java -version  # confirm "21.0.1+"

  2. Redownload jdtls and replace:

    cd /yourpath/DTester/LSPs
rm -rf jdt-language-server
wget https://download.eclipse.org/jdtls/snapshots/  jdt-language-server-latest.tar.gz
tar -xvf jdt-language-server-latest.tar.gz -C .
mkdir jdt-language-server
mv config_linux jdt-language-server/
mv plugins jdt-language-server/
rm jdt-language-server-latest.tar.gz
chmod -R 755 jdt-language-server

  3. Update jar name in java_lsp.py (find from ls, e.g., org.eclipse.equinox.launcher_1.7.0.v20250519-0528.jar):

    Modify java_lsp.py

    jdt_lsp_jar = os.path.join(current_path, "jdt-language-server/plugins/[your_jar_name_from_ls].jar")

  4. Add debug in language_server.py to capture stderr:

    Modify language_server.py in _send_to_process:

    def _send_to_process(self, message):
    if self.process.poll() is not None: 
        exit_code = self.process.returncode
        stderr_output = self.process.stderr.read() if self.process.stderr else "No stderr" 
        raise RuntimeError(f"LSP server exited with code {exit_code}. Stderr: {stderr_output}")
    self.process.stdin.write(f"Content-Length: {len(message)}\r\n\r\n{message}")
    self.process.stdin.flush()

  5. Manual test jdtls command (replace jar name)

    cd /yourpath/DTester && java -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dlog.level=ALL -Dlog.file=/tmp/jdtls.log -Dosgi.clean=true -Xmx1G --add-modules=ALL-SYSTEM --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED -jar /yourpath/DTester/LSPs/jdt-language-server/plugins/[your_jar_name].jar -configuration /yourpath/DTester/LSPs/jdt-language-server/config_linux -data /tmp/jdtls-workspace

  6. Run the script again and check if the problem is solved.

2. Network is unreachable when downloading from Hugging Face (e.g., NewConnectionError: [Errno 101])

Problem Description

When running the script (e.g., main/generate_test.py) and loading models from Hugging Face, you may encounter the following traceback:

urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x...>: Failed to establish a new connection: [Errno 101] Network is unreachable
requests.exceptions.ConnectionError: (MaxRetryError("HTTPSConnectionPool(host='huggingface.co', port=443): Max retries exceeded with url: /Salesforce/codet5p-110m-embedding/resolve/main/model.safetensors (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x...>: Failed to establish a new connection: [Errno 101] Network is unreachable'))"), '(Request ID: ...)')

Solutions

After each step, you can run the script again and check if the problem is solved.

  1. Test and fix basic network:

    • Test ping: 
      ping huggingface.co
curl https://huggingface.co/Salesforce/codet5p-110m-embedding/resolve/main/config.json
    • Restart network: 
      sudo service network-manager restart

  2. Set proxy (if blocked or in restricted region):

    • Temporary: 
      export HTTP_PROXY="http://localhost:7890"  # replace with your proxy port
export HTTPS_PROXY="http://localhost:7890"
    • Permanent in ~/.bashrc: 
      vim ~/.bashrc  # add the exports
source ~/.bashrc

  3. Use Hugging Face mirror (e.g., for China users):

    • Temporary: 
      export HF_ENDPOINT="https://hf-mirror.com"
    • In code (at the top of the script, before from_pretrained): 
      os.environ['HF_ENDPOINT'] = 'https://hf-mirror.com'

  4. Manual download for offline load (recommended for unreliable network):

    • Download files from https://huggingface.co/Salesforce/codet5p-110m-embedding/tree/main (config.json, model.safetensors, tokenizer.json, etc.).
    • Create local dir: 
      mkdir -p /yourpath/models/codet5p-110m-embedding
# copy files to this dir
    • Modify main/generate_test.py line 81 (and the same line in generate_test_using_manual_desc.py): 
      embedding_model = AutoModel.from_pretrained("/yourpath/models/codet5p-110m-embedding", trust_remote_code=True).eval().to('cuda')