public void createPeerRemoteWALDir(String peerId) throws IOException {
    Path peerRemoteWALDir = getPeerRemoteWALDir(remoteWALDir, peerId);
    if (!fs.exists(peerRemoteWALDir) && !fs.mkdirs(peerRemoteWALDir)) {
      throw new IOException("Unable to mkdir " + peerRemoteWALDir);
    }
  }
Will only be called when loading procedures, where we need to construct the used worker set for
each peer.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/replication/SyncReplicationReplayWALManager.java