#Non

异常:NoNodeAvailableException

 1、启动时候出现nodenullnotpartoftheclusterCluster[********],ignoring...2、启动时正常,但是请求时出现NoNodeAvailableException1、配置错误   使用TransportClient时要特别注意配置信息...
代码星球 ·2021-02-23

clikhouse报错: DB::Exception: Cannot convert NULL to a non-nullable type

 /Receivedexceptionfromserver(version20.2.1):Code:42.DB::Exception:Receivedfromlocalhost:9000.DB::Exception:StorageMergeTreerequires3to4parameters:nameofco...

http协议里的Last-Modified,If-Modified-Since,If-None-Match,ETag的简单理解

1.从服务端传给客户端的:  1)Last-Modified:表示服务端资源最后修改的时间,也就是传给客户端,用于告诉客户端,服务端资源最后修改的时间  2)Etag:表示字符串唯一标识符,也是传给客户端,用于告诉客户端,表示服务端资源发生修改了的最新标识。因为Last-Modified的一些缺陷,比如只能标识到时间秒...

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'userinfo.

  安装了mysql5.7,用groupby查询时抛出如下异常:1Expression#3ofSELECTlistisnotinGROUPBYclauseandcontainsnonaggregatedcolumn'userinfo.t_long.user_name'whichisnotfunctionallydepe...

Threads and Anonymous Classes in JAVA

Asweallknow,athreadisaseparateprocessonyourcomputer.youcanrunmultiplethreadsallatthesametime.multi-threadedcodehasthedisadvantageofbecomingquitecomplexveryquick...

appium 报错:AttributeError:"NoneType' object has no attribute 'XXX'

报错截图如下: 问题原因:  根据以上报错提示可已看到问题的原因为:logger中没有info此方法的调用,点击“具体报错的位置”上面的链接,可直接定位到具体的报错位置。根据分析所得:info是logging中的方法,并不是logger中方法。解决方法:  查看noattribute后面的参数‘info’是否是在当前l...

What is the difference between visibility:hidden and display:none?

答案1display:nonemeansthatthetaginquestionwillnotappearonthepageatall(althoughyoucanstillinteractwithitthroughthedom).Therewillbenospaceallocatedforitbetweentheot...

references non-existing project XXX, launch configuration问题的解决办法

GotoProject->propertiesInpropertieswindow'sleftpaneselect"Run/DebugSettings".Select"Configure"andclick"edit"Intab"Main"replaceProjecttoyourcurrentproject.Sel...

POSTGRESQL中ERROR: recursive query "t" column 2 has type character varying(150) in non-recursive term but type character varying overall

最近在做项目的时候有个需求是需要查到当前登录的用户下辖所有区域的数据,并将查询出来的部门信息以如下格式展示最高人民法院>江苏省高级人民法院>南通市中级人民法院最高人民法院>江苏省高级人民法院>连云港市中级人民法院,于是用如下语句查询 WITHRECURSIVETAS(SELECTc_i...

mysql 8.0下的SELECT list is not in GROUP BY clause and contains nonaggregated column

mysql的版本mysql>selectversion();+-----------+|version()|+-----------+|8.0.12|+-----------+在执行group by时遇到报错,具体如下mysql>select*fromapi_propertiesGROUPBYfi...
代码星球 ·2021-02-01

mysql问题解决SELECT list is not in GROUP BY clause and contains nonaggregated column

今天在Ubuntu下的部署项目,发现一些好好的列表页面发生1055:Expression#11ofSELECTlistisnotinGROUPBYclauseandcontainsnonaggregatedcolumn'ppm_c.ppm_flow_starting_dealing.status'whichisnotf...

arm交叉编译器gnueabi、none-eabi、arm-eabi、gnueabihf等的区别

博客来之于: http://www.veryarm.com/296.html 命名规则:交叉编译工具链的命名规则为:arch[-vendor][-os][-(gnu)eabi]arch -体系架构,如ARM,MIPSverdor-工具链提供商os-目标操作系统eabi-嵌入式应用二进制接口...

Python 判断参数为Nonetype类型或空

原文:https://blog.csdn.net/LucasXu01/article/details/88144904...

【gcc】warning: control reaches end of non-void function

用gcc编译一个C程序的时候出现这样的警告:warning:controlreachesendofnon-voidfunction它的意思是:控制到达非void函数的结尾。就是说你的一些本应带有返回值的函数到达结尾后可能并没有返回任何值。这时候,最好检查一下是否每个控制流都会有返回值。 如:#include&...
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