git报错： Could not read from remote repository.Please make sure you have the correct access rights

`ERROR org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService: Most of the disks failed. 1/1 local-dirs have errors:[ /opt/ha/hadoop/data/nm-local-dir : Cannot create directory : /opt/ha/ha

datax在hadoop ha的狀態下報錯：- org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby. Visit https://s.apache.org/sbnn-error

hadoop在啓動JournalNode，報錯：Caused by: java.net.BindException: Address already in use

hive on spark 时，executor和driver的内存设置，yarn的资源设置。

hadoop配置文件之capacity-site.xml

mysql取json数组中的数据

superset安裝出錯：pip subprocess to install build dependencies did not run successfully.

ERROR MaxwellBootstrapUtility - Connections could not be acquired from the underlying database!Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher s

Operation category READ is not supported in state standby. Visit https://s.apache.org/sbnn-error