Flink 运行中TaskManager退出

Flink运行一段时间后，出现TaskManager退出情况，通过jvisualvm抓取TaskManager的Dump，使用MAT进行分析，结果如下：

One instance of "org.apache.flink.runtime.io.network.buffer.NetworkBufferPool"loaded by "sun.misc.Launcher$AppClassLoader @ 0x6c01de310" occupies 403,429,704 (76.24%) bytes. The memory is accumulated in one instance of "java.lang.Object[]" loaded by "<system class loader>".

Keywords
sun.misc.Launcher$AppClassLoader @ 0x6c01de310
java.lang.Object[]
org.apache.flink.runtime.io.network.buffer.NetworkBufferPool