随笔分类 -  bigdata错误解决

hadoop之 exceeds the limit of concurrent xcievers处理
摘要:dfs.datanode.max.transfer.threads: 默认 4096 < 2.0之前该参数为dfs.datanode.max.xcievers >解释:Specifies the maximum number of threads to use for transferring da 阅读全文

posted @ 2018-02-01 11:36 张冲andy 阅读(735) 评论(0) 推荐(0) 编辑

hadoop之 node manager起不来, 执行mapreduce 程序hang住
摘要:现象: node manager起不来, 执行mapreduce 程序hang住 namenode 进程状态查询[root@hadp-master sbin]# jps8608 ResourceManager8257 NameNode9268 Jps8453 SecondaryNameNode da 阅读全文

posted @ 2018-01-28 19:39 张冲andy 阅读(617) 评论(0) 推荐(0) 编辑

hadoop之 安全模式及SafeModeException
摘要:问题: hadoop启动的时候报错 HTTP ERROR 500 Problem accessing /nn_browsedfscontent.jsp. Reason: Cannot issue delegation token. Name node is in safe mode. The rep 阅读全文

posted @ 2017-10-13 11:30 张冲andy 阅读(918) 评论(0) 推荐(0) 编辑

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