hi~ Java 语法不支持，Long 可以设置
赵一旦 于2021年1月7日周四 下午8:13写道：
> 报错信息如下：
> java.lang.IllegalArgumentException: Can not set long field
> com.xxx.buzz.pojo.AbstractDrRecord.timestamp to null value
> at
> sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(
> UnsafeFieldAccessorImpl.java:167)
> at
> sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(
> UnsafeFieldAccessorImpl.java:171)
> at sun.reflect.UnsafeLongFieldAccessorImpl.set(
> UnsafeLongFieldAccessorImpl.java:80)
> at java.lang.reflect.Field.set(Field.java:764)
> at org.apache.flink.api.java.typeutils.runtime.PojoSerializer
> .deserialize(PojoSerializer.java:409)
> at org.apache.flink.streaming.runtime.streamrecord.
> StreamElementSerializer.deserialize(StreamElementSerializer.java:202)
> at org.apache.flink.streaming.runtime.streamrecord.
> StreamElementSerializer.deserialize(StreamElementSerializer.java:46)
> at org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate
> .read(NonReusingDeserializationDelegate.java:55)
> at org.apache.flink.runtime.io.network.api.serialization.
> SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(
> SpillingAdaptiveSpanningRecordDeserializer.java:92)
> at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput
> .emitNext(StreamTaskNetworkInput.java:145)
> at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor
> .processInput(StreamOneInputProcessor.java:67)
> at org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor
> .processInput(StreamTwoInputProcessor.java:92)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(
> StreamTask.java:372)
> at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor
> .runMailboxLoop(MailboxProcessor.java:186)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(
> StreamTask.java:575)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask
> .java:539)
> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:722)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:547)
> at java.lang.Thread.run(Thread.java:748)
>
>
> 根据堆栈找到报错位置代码为：
>
> try {
>for (int i = 0; i < numFields; i++) {
> boolean isNull = source.readBoolean();
>
> if (fields[i] != null) {
> if (isNull) {
> fields[i].set(target, null); //
> 此处报错，设置null，但这个字段是long基础数据类型，非包装类型。
> } else {
> Object field = fieldSerializers[i].deserialize(source);
> fields[i].set(target, field);
> }
> } else if (!isNull) {
> // read and dump a pre-existing field value
> fieldSerializers[i].deserialize(source);
> }
>}
> } catch (IllegalAccessException e) {
>throw new RuntimeException("Error during POJO copy, this should not
> happen since we check the fields before.", e);
> }
>
--
Best，
pp
