@Override
  protected void toStringClassDetails(StringBuilder builder) {
    builder.append(getProcName());
    if (this.targetServer != null) {
      builder.append(", worker=");
      builder.append(this.targetServer);
    }
  }
A remote procedure which is used to send split WAL request to region server. It will return null
if the task succeeded or return a DoNotRetryIOException. {@link SplitWALProcedure} will help
handle the situation that encounters DoNotRetryIOException. Otherwise it will retry until
success.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/SplitWALRemoteProcedure.java