hi， 我在使用1.11版本在本地idea起一个作业时，并发为1，抛出了如下关于内存的异常。。问题是之前从来没有显示配置过taskmanager的memory参数，这是为何？ 感觉由1.10升级到1.11问题还是挺多的。。我尝试增加了JVM参数，增加DirectMemory内存配置，还是没有作用，请教大神帮忙看下。
Exception in thread "main" java.lang.OutOfMemoryError: Could not allocate enough memory segments for NetworkBufferPool (required (Mb): 64, allocated (Mb): 63, missing (Mb): 1). Cause: Direct buffer memory. The direct out-of-memory error has occurred. This can mean two things: either job(s) require(s) a larger size of JVM direct memory or there is a direct memory leak. The direct memory can be allocated by user code or some of its dependencies. In this case 'taskmanager.memory.task.off-heap.size' configuration option should be increased. Flink framework and its dependencies also consume the direct memory, mostly for network communication. The most of network memory is managed by Flink and should not result in out-of-memory error. In certain special cases, in particular for jobs with high parallelism, the framework may require more direct memory which is not managed by Flink. In this case 'taskmanager.memory.framework.off-heap.size' configuration option should be increased. If the error persists then there is probably a direct memory leak in user code or some of its dependencies which has to be investigated and fixed. The task executor has to be shutdown...
