#journal

ORA-08106: cannot create journal table string.string

文档解释ORA-08106:cannotcreatejournaltablestring.stringCause:TheonlineindexbuildercouldnotcreateitsjournaltableAction:renameyourtableinconflictorreruntheSQLstatemen...

hadoop中的JournalNode

 1.在HADOOP扮演的角色JournalNode是在MR2也就是Yarn中新加的,journalNode的作用是存放EditLog的,在MR1中editlog是和fsimage存放在一起的然后SecondNamenode做定期合并,Yarn在这上面就不用SecondNamanode了. &nbs...
代码星球 ·2021-02-22

Incompatible namespaceID for journal Storage Directory /home/hkx/journaldata/ns2: NameNode has nsId 480343035 but storage has nsId 2072447892

原因是因为你的hadoop.tmp.dir在/tmp目录下,而linux系统的/tmp文件夹内容能够是定时清理的,所以会导致你看hadoop使用不了了,就反复的格式化namenode会导致上述问题,也有可能是datanode长期没正常启动导致;找了一下资料,有三个解决方案:解決方法一:删除datanode的所有资料,主...

Six ways to think like a journalist!

    Journalistshavetheabilitytostateathingmoreclearly.Whatcanwelearnfromthemtohelpusreportorexplainthingslikethem?    Th...
代码星球 ·2020-04-06