0 datanode(s) running

[icissy]

执行docker-compose exec spark-master jar cv0f /code/spark-libs.jar -C /root/spark/jars/ .
报错：
put: File /user/spark/share/lib/spark-libs.jar.COPYING could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded in this operation.

[ruoyu-chen]

出现这种错误，最大的可能就是HDFS没有正常启动起来，有可能是你第一次运行集群忘记格式化HDFS了；如果已经不是第一次运行集群了，那就重启一下HDFS。具体原因要看datanode的日志