protected void renameJarsWithOldNamingConvention() throws IOException {
    Set<File> jarsWithOldNamingConvention = findJarsWithOldNamingConvention();

    if (jarsWithOldNamingConvention.isEmpty()) {
      return;
    }

    for (File jar : jarsWithOldNamingConvention) {
      renameJarWithOldNamingConvention(jar);
    }
  }
Make sure that the deploy directory is writable.

@throws IOException If the directory isn't writable
geode-deployment/geode-deployment-legacy/src/main/java/org/apache/geode/deployment/internal/JarDeployer.java