private void checkError(Thread t, Throwable error) {
    OOMEChecker.exitIfOOME(error, getClass().getSimpleName());
    LOG.error("Unexpected exception in {} currentPath={}", t.getName(), getCurrentPath(), error);
    if (abortOnError) {
      server.abort("Unexpected exception in " + t.getName(), error);
    }
  }
Call after {@link #initializeWALEntryFilter(UUID)} else it will be null.
@return WAL Entry Filter Chain to use on WAL files filtering *out* WALEntry edits.
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSource.java