Program: 8965
Project: 8965
Buggy source:
public void serveClient(@NotNull Socket socket) throws IOException, SVNException {
  socket.setTcpNoDelay(true);
  final SvnServerWriter writer=new SvnServerWriter(new BufferedOutputStream(socket.getOutputStream()));
  final SvnServerParser parser=new SvnServerParser(socket.getInputStream());
  final ClientInfo clientInfo=exchangeCapabilities(parser,writer);
  final RepositoryInfo repositoryInfo=repositoryMapping.getRepository(clientInfo.getUrl());
  if (repositoryInfo == null) {
    BaseCmd.sendError(writer,SVNErrorMessage.create(SVNErrorCode.RA_SVN_REPOS_NOT_FOUND,"String_Node_Str" + clientInfo.getUrl()));
    return;
  }
  final User user=authenticate(parser,writer,repositoryInfo);
  log.info("String_Node_Str",user);
  final SessionContext context=new SessionContext(parser,writer,this,repositoryInfo,clientInfo,user);
  final VcsRepository repository=context.getRepository();
  repository.updateRevisions();
  sendAnnounce(writer,repositoryInfo);
  while (!isInterrupted()) {
    try {
      Step step=context.poll();
      if (step != null) {
        step.process(context);
        continue;
      }
      final SvnServerToken token=parser.readToken();
      if (token != ListBeginToken.instance) {
        throw new IOException("String_Node_Str" + token);
      }
      final String cmd=parser.readText();
      BaseCmd command=commands.get(cmd);
      if (command != null) {
        log.debug("String_Node_Str",cmd);
        Object param=MessageParser.parse(command.getArguments(),parser);
        parser.readToken(ListEndToken.class);
        command.process(context,param);
      }
 else {
        log.warn("String_Node_Str",cmd);
        BaseCmd.sendError(writer,SVNErrorMessage.create(SVNErrorCode.RA_SVN_UNKNOWN_CMD,"String_Node_Str" + cmd));
        parser.skipItems();
      }
    }
 catch (    SVNException e) {
      log.error("String_Node_Str",e);
      BaseCmd.sendError(writer,e.getErrorMessage());
    }
  }
}

Fixed version (ground truth):
public void serveClient(@NotNull Socket socket) throws IOException, SVNException {
  socket.setTcpNoDelay(true);
  final SvnServerWriter writer=new SvnServerWriter(new BufferedOutputStream(socket.getOutputStream()));
  final SvnServerParser parser=new SvnServerParser(socket.getInputStream());
  final ClientInfo clientInfo=exchangeCapabilities(parser,writer);
  final RepositoryInfo repositoryInfo=repositoryMapping.getRepository(clientInfo.getUrl());
  if (repositoryInfo == null) {
    BaseCmd.sendError(writer,SVNErrorMessage.create(SVNErrorCode.RA_SVN_REPOS_NOT_FOUND,"String_Node_Str" + clientInfo.getUrl()));
    return;
  }
  final User user=authenticate(parser,writer,repositoryInfo);
  log.info("String_Node_Str",user);
  final SessionContext context=new SessionContext(parser,writer,this,repositoryInfo,clientInfo,user);
  final VcsRepository repository=context.getRepository();
  repository.updateRevisions();
  sendAnnounce(writer,repositoryInfo);
  while (!isInterrupted()) {
    try {
      Step step=context.poll();
      if (step != null) {
        step.process(context);
        continue;
      }
      final SvnServerToken token=parser.readToken();
      if (token != ListBeginToken.instance) {
        throw new IOException("String_Node_Str" + token);
      }
      final String cmd=parser.readText();
      BaseCmd command=commands.get(cmd);
      if (command != null) {
        log.debug("String_Node_Str",cmd);
        Object param=MessageParser.parse(command.getArguments(),parser);
        parser.readToken(ListEndToken.class);
        command.process(context,param);
      }
 else {
        log.warn("String_Node_Str",cmd);
        BaseCmd.sendError(writer,SVNErrorMessage.create(SVNErrorCode.RA_SVN_UNKNOWN_CMD,"String_Node_Str" + cmd));
        parser.skipItems();
      }
    }
 catch (    SVNException e) {
      if (e.getErrorMessage().getErrorCode() == SVNErrorCode.RA_NOT_AUTHORIZED) {
        log.warn("String_Node_Str",e.getMessage());
      }
 else {
        log.error("String_Node_Str",e);
      }
      BaseCmd.sendError(writer,e.getErrorMessage());
    }
  }
}