Flink运行报 IO error constructing remote block reader

Flink运行报 I/O error constructing remote block reader

问题描述：

IDEA中运行Flink实时计算程序，一直报：

WARN org.apache.hadoop.hdfs.client.impl.BlockReaderFactory - I/O error constructing remote block reader.

java.nio.channels.CloseByInterruptException

at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:202)

at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:656)

起初看到时WARN就没太在意，后发现写Hudi表时出现大量rollback.

解决方法：

使用RocksDBStateBackend解决

env.setStateBackend(new RocksDBStateBackend(chckpointPath, true))

join的数据量比较大，需要存储的State和Checkpoint也就比较大，所以在提交Checkpoint时出现了IO异常,换成RocksDBStateBackend后解决