public void writeStatus(Session.Status sessionStatus) {
        try {
            createWriteStatusTransaction(sessionStatus).commit();
        } catch (Exception e) {
            throw new RuntimeException("Unable to write session status", e);
        }
    }
Zookeeper client for a specific session. Path for a session is /config/v2/tenants/&lt;tenant&gt;/sessions/&lt;sessionid&gt;
Can be used to read and write session status and create and get prepare and active barrier.

@author Ulf Lilleengen
configserver/src/main/java/com/yahoo/vespa/config/server/session/SessionZooKeeperClient.java