Direct pool OOM again with netty 4.2.16

With netty upgrade to 4.2.16 we got the JVM direct pool OOM issue again , same as here: https://github.com/netty/netty/issues/15850

error log: but response failed with cause: reactor.netty.ReactorNetty$InternalNettyException: java.lang.OutOfMemoryError: Cannot reserve 139264 bytes of direct buffer memory (allocated: 268421167, limit: 268435456)