m0_37306331的博客

如果 standby 的 NN 节点的 ZKFC 发现主节点已经挂掉，那么就会强制给原本的 active NN 节点发送强制关闭请求，之后将备用的 NN 设置为 active。所以如果NameNode中的元数据丢失，是可以从Secondary NameNode 恢复一部所以如果NameNode中的元数据丢失，是可以从Secondary NameNode恢复一部分元数据信息的，但是不是全部，因为Namenode正在写的edits日志还没有拷贝到Secondary NameNode，这部分恢复不了。

schema操作创建schemacreate schema "foo";切换schemause "foo";删除schemadrop schema if exists "foo";0: jdbc:phoenix:thin:url=http://hb-bp1ya00iwt> create schema "foo";No rows affected (0.234 seconds)0: jdbc:phoenix:thin:url=http://hb-bp1ya0...

命名空间管理hbase(main):038:0> create_namespace 'foo'Took 0.2400 seconds

创建命名空间hbase(main):018:0> create_namespace 'foo'Took 0.2535 seconds 0: jdbc:phoenix:thin:url=http://hb-bp1ya00iwt> create schema foo;No rows affected (0.256 seconds) DROP schema FOO;2创建表命名空间 foo，表名stu，列族infohbase(main):019:0> ...

flink自定义数据源loghub报错Caused by: java.lang.ClassNotFoundException: net.sf.ezmorph.Morpherjava.lang.NoClassDefFoundError: net/sf/ezmorph/Morpher at net.sf.json.util.CycleDetectionStrategy.<clinit>(CycleDetectionStrategy.java:37) ~[flink-connector-

org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: No operators defined in streaming topology. Cannot execute.The program finished with the following exception:org.apache.flink.client.program.ProgramInvocation

java.lang.IllegalStateException: No Executor found. Please make sure to export the HADOOP_CLASSPATH environment variable or have hadoop in your classpath. For more information refer to the "Deployment" section of the official Apache Flink documentation

升级flink1.14.3报错Caused by: org.apache.flink.table.api.ValidationException: Unable to create a source for reading table 'default_catalog.default_database.new_buyer_trade_order2'CAUSED BY: 2022-03-11 16:45:04,169 INFO org.apache.flink.yarn.cli.FlinkYar.

1下载Index of apache-local/hive/hive-2.3.6到路径/Users/xx/Downloads/tool2解压重命名 apache-hive-2.3.63在路径/Users/xx/Downloads/tool/hive_conf/conf路径新建hive-site.xml，配置mysql元数据<?xml version="1.0"?><configuration> <property> <name&gt