protected void unregisterCommitSessionValve() {
    if (getLogger().isDebugEnabled()) {
      getLogger().debug(this + ": Unregistering CommitSessionValve");
    }
    if (commitSessionValve != null) {
      getPipeline().removeValve(commitSessionValve);
    }
  }
For debugging: return a list of all session ids currently active
extensions/geode-modules/src/main/java/org/apache/geode/modules/session/catalina/DeltaSessionManager.java