protected boolean shouldKillBeforeStoreUpdateInRollback() {
      final boolean kill = this.killBeforeStoreUpdateInRollback;
      if (this.toggleKillBeforeStoreUpdateInRollback) {
        this.killBeforeStoreUpdateInRollback = !kill;
        LOG.warn("Toggle KILL before store update in rollback to: "
          + this.killBeforeStoreUpdateInRollback);
      }
      return kill;
    }
Set when we want to fail AFTER state has been stored into the WAL. Rarely used. HBASE-20978
is about a case where memory-state was being set after store to WAL where a crash could cause
us to get stuck. This flag allows killing at what was a vulnerable time.
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java