void memberFinishedBarrier(String procName, final String member, byte[] dataFromMember) {
    Procedure proc = procedures.get(procName);
    if (proc == null) {
      LOG.warn(
        "Member '" + member + "' is trying to release an unknown procedure '" + procName + "'");
      return;
    }
    if (LOG.isTraceEnabled()) {
      LOG.trace("Member '" + member + "' released procedure '" + procName + "'");
    }
    proc.barrierReleasedByMember(member, dataFromMember);
  }
Notification that the procedure had another member finished executing its in-barrier subproc
via {@link Subprocedure#insideBarrier()}.
@param procName       name of the subprocedure that finished
@param member         name of the member that executed and released its barrier
@param dataFromMember the data that the member returned along with the notification
hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinator.java