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Posted to user-zh@flink.apache.org by <th...@yahoo.com.INVALID> on 2021/03/28 11:11:42 UTC

ransient 关键字加上和去掉单机执行结果一样，transient 关键字加上有什么作用，什么情况下会有区别？

 【问题描述】). transient 关键字加上和去掉单机执行结果一样，transient 关键字加上有什么作用，什么情况下会有区别？).代码public class FraudDetector extends KeyedProcessFunction<Long, Transaction, Alert> {

    private static final long serialVersionUID = 1L;

    private transient ValueState<Boolean> flagState;

    @Override
    public void open(Configuration parameters) {
        ValueStateDescriptor<Boolean> flagDescriptor = new ValueStateDescriptor<>(
                "flag",
                Types.BOOLEAN);
        flagState = getRuntimeContext().getState(flagDescriptor);
    }


【问题复现】).flink 官网示例 : Fraud Detection).代码地址:https://ci.apache.org/projects/flink/flink-docs-release-1.12/try-flink/datastream_api.html