Operation category READ is not supported in state standby
时间: 2023-09-03 09:14:33 浏览: 75
"Operation category READ is not supported in state standby"的意思是在待机状态下不支持读取操作类别。这是因为你的Hadoop集群处于待机状态,而待机状态下的节点不支持读取操作。通常情况下,这是因为Hadoop长时间没有运行而被切换到待机状态,类似于Windows系统的待机功能。
要解决这个问题,你需要将Hadoop集群中的节点状态进行切换。具体操作是将nn1节点从待机模式切换为活动模式(active),将nn2节点从活动模式切换为待机模式(standby)。你可以使用以下命令来完成此操作:bin/hdfs haadmin -getServiceState nn1。
这样做之后,待机状态的节点就会切换为活动状态,读取操作也就能够被支持了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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