Author Archives: Robins

Gateway forwards weboskct with an error ClassCastException

15:30:38.092 [http-nio-9999-exec-1] ERROR c.m.g.e.GlobalErrorWebExceptionHandler - [handle,38] - org.apache.catalina.connector.ResponseFacade cannot be cast to reactor.netty.http.server.HttpServerResponse
java.lang.ClassCastException: org.apache.catalina.connector.ResponseFacade cannot be cast to reactor.netty.http.server.HttpServerResponse
	at org.springframework.web.reactive.socket.server.upgrade.ReactorNettyRequestUpgradeStrategy.getNativeResponse(ReactorNettyRequestUpgradeStrategy.java:182)
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
	|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ HTTP GET "/sys/websocket/1" [ExceptionHandlingWebHandler]
Stack trace:
		at org.springframework.web.reactive.socket.server.upgrade.ReactorNettyRequestUpgradeStrategy.getNativeResponse(ReactorNettyRequestUpgradeStrategy.java:182)
		at org.springframework.web.reactive.socket.server.upgrade.ReactorNettyRequestUpgradeStrategy.upgrade(ReactorNettyRequestUpgradeStrategy.java:162)
		at org.springframework.web.reactive.socket.server.support.HandshakeWebSocketService.lambda$handleRequest$1(HandshakeWebSocketService.java:235)
		at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:151)
		at reactor.core.publisher.MonoFlatMap.subscribeOrReturn(MonoFlatMap.java:53)
		at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:57)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
		at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172)
		at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
		at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at com.alibaba.csp.sentinel.adapter.reactor.MonoSentinelOperator.subscribe(MonoSentinelOperator.java:40)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
		at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
		at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)

<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>javax.servlet-api</artifactId>
</dependency>
 <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>jstl</artifactId>
</dependency>
<dependency>
	<groupId>org.apache.tomcat.embed</groupId>
	<artifactId>tomcat-embed-jasper</artifactId>
</dependency>

Error when Python executes JavaScript statement

‘gbk’ codec can’t encode character ‘\u20ac’ in position 62114: illegal multibyte sequence
find this line in the JS files:

e = "a€|",

It should be this symbol that reports an error. How to solve it

with open('./encryp_js/eventid_encryp.js', 'r', encoding='utf-8') as f:
    content = f.read()
jsdata = execjs.compile(content)

How to Solve Azkaban startup error

Environment.
One virtual machine (web and exector both on one machine)
MySQL 8.x (most of the later problems are due to him)
Hive-3.1.2
Azkaban-exec-server-3.84.4
Azkaban-web-server-3.84.4
1. SLF4J problems:
ERROR [StdOutErrRedirect] [Azkaban] SLF4J: Class path contains multiple SLF4J bindings.

2021/09/30 10:02:31.820 +0800 ERROR [StdOutErrRedirect] [Azkaban] SLF4J: Class path contains multiple SLF4J bindings.
2021/09/30 10:02:31.820 +0800 ERROR [StdOutErrRedirect] [Azkaban] SLF4J: Found binding in [jar:file:/opt/module/azkaban/azkaban-exec/lib/slf4j-log4j12-1.7.21.jar!/org/slf4j/impl/StaticLoggerBinder.class]
2021/09/30 10:02:31.820 +0800 ERROR [StdOutErrRedirect] [Azkaban] SLF4J: Found binding in [jar:file:/data/soft/apache-hive-3.1.2-bin/lib/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
2021/09/30 10:02:31.820 +0800 ERROR [StdOutErrRedirect] [Azkaban] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
2021/09/30 10:02:31.823 +0800 ERROR [StdOutErrRedirect] [Azkaban] SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

Cause: conflict with log4j package in hive
solution: delete Azkaban exec/lib/slf4j-log4j12-1.7.21.jar or add. Bak suffix
command:

cd /azkaban-exec/lib
mv slf4j-log4j12-1.7.21.jar slf4j-log4j12-1.7.21.jar.bak

2. DB connection problems(MySQL 8)
ERROR [MySQLDataSource] [Azkaban] Failed to find write-enabled DB connection.

2021/09/30 10:23:33.973 +0800 ERROR [MySQLDataSource] [Azkaban] Failed to find write-enabled DB connection. Wait 15 seconds and retry. No.Attempt = 1
java.sql.SQLException: Cannot create PoolableConnectionFactory (java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long)
        at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2294)

Reason: there is a problem with the MySQL driver package. The MySQL driver package provided by Azkaban cannot connect to MySQL 8. Just change to mysql-connector-java-5.1.47, and then a usessl error will be reported. This can be changed to MySQL. Database = Azkaban?Usessl = false in azkaban.properties. (both web and exector will report this error. Just modify it in turn)

3.
ERROR [PluginCheckerAndActionsLoader] [Azkaban] plugin path plugins/triggers doesn’t exist!
ERROR [ExecutorManager] [Azkaban] No active executors found

2021/09/30 10:47:52.799 +0800 ERROR [PluginCheckerAndActionsLoader] [Azkaban] plugin path plugins/triggers doesn't exist!
2021/09/30 10:47:52.838 +0800 INFO [AzkabanWebServer] [Azkaban] Setting timezone to Asia/Shanghai
2021/09/30 10:47:52.838 +0800 INFO [AzkabanWebServer] [Azkaban] Registering MBeans...
2021-09-30T10:47:52,869 INFO [main] azkaban.server.MBeanRegistrationManager - Bean azkaban.jmx.JmxJettyServer registered.
2021-09-30T10:47:52,871 INFO [main] azkaban.server.MBeanRegistrationManager - Bean azkaban.jmx.JmxTriggerManager registered.
2021-09-30T10:47:52,890 INFO [main] azkaban.server.MBeanRegistrationManager - Bean azkaban.jmx.JmxExecutorManager registered.
2021-09-30T10:47:52,915 INFO [main] azkaban.server.MBeanRegistrationManager - Bean org.apache.log4j.jmx.HierarchyDynamicMBean registered.
2021/09/30 10:47:52.915 +0800 INFO [AzkabanWebServer] [Azkaban] ************* loginLoggerObjName is null, make sure there is a logger with name azkaban.webapp.servlet.LoginAbstractAzkabanServlet
2021/09/30 10:47:52.916 +0800 INFO [ExecutorManager] [Azkaban] Initializing executors from database.
2021/09/30 10:47:52.941 +0800 ERROR [ExecutorManager] [Azkaban] No active executors found
2021/09/30 10:47:52.942 +0800 ERROR [StdOutErrRedirect] [Azkaban] Exception in thread "main"
2021/09/30 10:47:52.942 +0800 ERROR [StdOutErrRedirect] [Azkaban] azkaban.executor.ExecutorManagerException: No active executors found
2021/09/30 10:47:52.942 +0800 ERROR [StdOutErrRedirect] [Azkaban]       at azkaban.executor.ActiveExecutors.setupExecutors(ActiveExecutors.java:52)
2021/09/30 10:47:52.943 +0800 ERROR [StdOutErrRedirect] [Azkaban]       at azkaban.executor.ExecutorManager.setupExecutors(ExecutorManager.java:192)
2021/09/30 10:47:52.943 +0800 ERROR [StdOutErrRedirect] [Azkaban]       at azkaban.executor.ExecutorManager.initialize(ExecutorManager.java:127)
2021/09/30 10:47:52.943 +0800 ERROR [StdOutErrRedirect] [Azkaban]       at azkaban.executor.ExecutorManager.start(ExecutorManager.java:141)
2021/09/30 10:47:52.943 +0800 ERROR [StdOutErrRedirect] [Azkaban]       at azkaban.webapp.AzkabanWebServer.launch(AzkabanWebServer.java:234)
2021/09/30 10:47:52.943 +0800 ERROR [StdOutErrRedirect] [Azkaban]       at azkaban.webapp.AzkabanWebServer.main(AzkabanWebServer.java:227)

ERROR [PluginCheckerAndActionsLoader] [Azkaban] plugin path plugins/triggers doesn’t exist!
(you can refer to this.) https://blog.csdn.net/liumu243/article/details/81288884 ）
this error can be ignored or run. The main problem here is that the exector is not activated

curl -G "localhsot:12321/executor?action=activate" && echo
//Appears to prove successful activation
{status:success}

Administrative Region:
https://192.168.xx.xx:8443
http://192.168.xx.xx:8081

How to Solve Springboot Upload Files Error: The field XXX exceeds its maximum permitted size of 1048576 bytes

When uploading a file using springboot, the following error is reported

 ERROR 11136 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.multipart.MaxUploadSizeExceededException: Maximum upload size exceeded; nested exception is java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.impl.FileSizeLimitExceededException: The field photos exceeds its maximum permitted size of 1048576 bytes.] with root cause

org.apache.tomcat.util.http.fileupload.impl.FileSizeLimitExceededException: The field photos exceeds its maximum permitted size of 1048576 bytes.
	at org.apache.tomcat.util.http.fileupload.impl.FileItemStreamImpl$1.raiseError(FileItemStreamImpl.java:114) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.http.fileupload.util.LimitedInputStream.checkLimit(LimitedInputStream.java:76) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.http.fileupload.util.LimitedInputStream.read(LimitedInputStream.java:135) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at java.io.FilterInputStream.read(FilterInputStream.java:107) ~[na:1.8.0_221]
	at org.apache.tomcat.util.http.fileupload.util.Streams.copy(Streams.java:98) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:291) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.connector.Request.parseParts(Request.java:2922) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.connector.Request.getParts(Request.java:2824) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1098) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:95) ~[spring-web-5.3.9.jar:5.3.9]
	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:88) ~[spring-web-5.3.9.jar:5.3.9]
	at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:122) ~[spring-web-5.3.9.jar:5.3.9]
	at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1202) ~[spring-webmvc-5.3.9.jar:5.3.9]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1036) ~[spring-webmvc-5.3.9.jar:5.3.9]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.9.jar:5.3.9]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.9.jar:5.3.9]
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.9.jar:5.3.9]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.52.jar:4.0.FR]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.9.jar:5.3.9]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.52.jar:4.0.FR]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.9.jar:5.3.9]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.9.jar:5.3.9]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.9.jar:5.3.9]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1726) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.52.jar:9.0.52]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_221]

Error reporting reason:

The upload size of a single file cannot be more than 1MB

The upload size of multiple files cannot be more than 10MB

Simple analysis of the underlying source code of springboot

// I have intercepted parts of both of these classes, so those who are interested can see for themselves

// Configuration class for file upload
public class MultipartProperties {
    private boolean enabled = true;
    private String location;

    // Default individual file size is 1MB
    private DataSize maxFileSize = DataSize.ofMegabytes(1L);
    
    // Default multiple file size is 10MB
    private DataSize maxRequestSize = DataSize.ofMegabytes(10L);
    
    private DataSize fileSizeThreshold = DataSize.ofBytes(0L);
    private boolean resolveLazily = false;
}

// Set file size
public final class DataSize implements Comparable<DataSize>, Serializable {
	/**
	 * The pattern for parsing.
	 */
	private static final Pattern PATTERN = Pattern.compile("^([+\\-]?\\d+)([a-zA-Z]{0,2})$");

	/**
	 * Bytes per Kilobyte.
	 */
	private static final long BYTES_PER_KB = 1024;

	/**
	 * Bytes per Megabyte.
	 */
	private static final long BYTES_PER_MB = BYTES_PER_KB * 1024;

	/**
	 * Bytes per Gigabyte.
	 */
	private static final long BYTES_PER_GB = BYTES_PER_MB * 1024;

	/**
	 * Bytes per Terabyte.
	 */
	private static final long BYTES_PER_TB = BYTES_PER_GB * 1024;


	private final long bytes;


	/**
	 * Obtain a {@link DataSize} representing the specified number of megabytes.
	 * @param megabytes the number of megabytes, positive or negative
	 * @return a {@link DataSize}
	 */
	public static DataSize ofMegabytes(long megabytes) {
		return new DataSize(Math.multiplyExact(megabytes, BYTES_PER_MB));
	}
}

Solution: you can customize the configuration in the properties or yaml configuration file to modify the maximum upload limit of spring boot file. Here I configure it in yaml

spring:
  mvc: 
  servlet:
    multipart:
      max-file-size: 10MB  		# Set the maximum size of a single file to 10MB
      max-request-size: 100MB # Set multiple file size to 100MB

numpy.concatenate() 253rd; 38169Keyerror: 0 [How to Solve]

numpy.concatenate()

Official Documentation Link
Function Description.
Join a sequence of arrays along an existing axis.
Join a sequence of arrays along an existing axis.

Program error

KeyError Traceback (most recent call last)
F:\Anacondaaa\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance)
3079 try:
-> 3080 return self._engine.get_loc(casted_key)
3081 except KeyError as err:
pandas_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc()
pandas_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc()
pandas_libs\hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
pandas_libs\hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
KeyError: 0
The above exception was the direct cause of the following exception:
KeyError Traceback (most recent call last)
in
—-> 1 np.unique(np.concatenate(movie_type[‘类型’].map(lambda x: x.split(’/’))))
<array_function internals> in concatenate(*args, **kwargs)
F:\Anacondaaa\lib\site-packages\pandas\core\series.py in getitem(self, key)
851
852 elif key_is_scalar:
–> 853 return self._get_value(key)
854
855 if is_hashable(key):
F:\Anacondaaa\lib\site-packages\pandas\core\series.py in _get_value(self, label, takeable)
959
960 # Similar to Index.get_value, but we do not fall back to positional
–> 961 loc = self.index.get_loc(label)
962 return self.index._get_values_for_loc(self, loc, label)
963
F:\Anacondaaa\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance)
3080 return self._engine.get_loc(casted_key)
3081 except KeyError as err:
-> 3082 raise KeyError(key) from err
3083
3084 if tolerance is not None:
KeyError: 0

Reasons and Suggestions
keyerror means no data, because np.concatenate itself is connected with the original index, and it doesn’t work because the original index is no longer continuous in the data cleaning process.
Reset the contiguous indexes or use other methods to join the list to achieve this effect.

Error in plot.new() : figure margins too large

Full error:

#Question

Fit the regression model and calculate the dfbetas value of each sample and the optimal dfbetas threshold. Finally, visualize the impact of each sample on each predictive variable;

#fit a regression model
model <- lm(mpg~disp+hp, data=mtcars)

#view model summary
summary(model)

#calculate DFBETAS for each observation in the model
dfbetas <- as.data.frame(dfbetas(model))

#display DFBETAS for each observation
dfbetas

#find number of observations
n <- nrow(mtcars)

#calculate DFBETAS threshold value
thresh <- 2/sqrt(n)

thresh

#specify 2 rows and 1 column in plotting region

#dev.off()
#par(mar = c(1, 1, 1, 1))

par(mfrow=c(2,1))

#plot DFBETAS for disp with threshold lines
plot(dfbetas$disp, type='h')
abline(h = thresh, lty = 2)
abline(h = -thresh, lty = 2)

#plot DFBETAS for hp with threshold lines 
plot(dfbetas$hp, type='h')
abline(h = thresh, lty = 2)
abline(h = -thresh, lty = 2)

#Solution
par(mar = c(1, 1, 1, 1))

#fit a regression model
model <- lm(mpg~disp+hp, data=mtcars)

#view model summary
summary(model)

#calculate DFBETAS for each observation in the model
dfbetas <- as.data.frame(dfbetas(model))

#display DFBETAS for each observation
dfbetas

#find number of observations
n <- nrow(mtcars)

#calculate DFBETAS threshold value
thresh <- 2/sqrt(n)

thresh

#specify 2 rows and 1 column in plotting region

#dev.off()
par(mar = c(1, 1, 1, 1))

par(mfrow=c(2,1))

#plot DFBETAS for disp with threshold lines
plot(dfbetas$disp, type='h')
abline(h = thresh, lty = 2)
abline(h = -thresh, lty = 2)

#plot DFBETAS for hp with threshold lines 
plot(dfbetas$hp, type='h')
abline(h = thresh, lty = 2)
abline(h = -thresh, lty = 2)

Full Error Message:
> par(mfrow=c(2,1))
>
> #plot DFBETAS for disp with threshold lines
> plot(dfbetas$disp, type=’h’)
Error in plot.new() : figure margins too large
> abline(h = thresh, lty = 2)
Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, …) :
plot.new has not been called yet
> abline(h = -thresh, lty = 2)
Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, …) :
plot.new has not been called yet
>
> #plot DFBETAS for hp with threshold lines
> plot(dfbetas$hp, type=’h’)
Error in plot.new() : figure margins too large
> abline(h = thresh, lty = 2)
Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, …) :
plot.new has not been called yet
> abline(h = -thresh, lty = 2)
Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, …) :
plot.new has not been called yet

Error in *** : subscript out of bounds [How to Solve]

Error in *** : subscript out of bounds

Full error:

Question:

The data is out of bounds. Except for others, who knows where it is? Do you ask memory? Who do you ask?

#make this example reproducible
set.seed(0)

#create matrix with 10 rows and 3 columns
x = matrix(data = sample.int(100, 30), nrow = 10, ncol = 3)

#print matrix
print(x)

#attempt to display 11th row of matrix
x[11, ]

#attempt to display 4th column of matrix
x[, 4]

#attempt to display value in 11th row and 4th column
x[11, 4]

Solution:

#display number of rows and columns in matrix
dim(x)

#display 10th row of matrix
x[10, ]

#display number of columns in matrix
ncol(x)

#display 3rd column of matrix
x[, 3]

#display value in 10th row and 3rd column of matrix
x[10, 3]

Full error Messages:
>
> #attempt to display 11th row of matrix
> x[11, ]
Error in x[11, ] : subscript out of bounds
>
> #attempt to display 4th column of matrix
> x[, 4]
Error in x[, 4] : subscript out of bounds
>
> #attempt to display value in 11th row and 4th column
> x[11, 4]
Error in x[11, 4] : subscript out of bounds
>

Shiro Error: Configuration error: No realms have been configured!

solution

Check if the ini configuration file is written in a standard way

correct demonstration:

error demonstration:

exception information

2021-10-05 17:12:26.609 [main] WARN  org.apache.shiro.authc.AbstractAuthenticator - Authentication failed for token submission [org.apache.shiro.authc.UsernamePasswordToken - ans, rememberMe=false].  Possible unexpected error?(Typical or expected login exceptions should extend from AuthenticationException).
java.lang.IllegalStateException: Configuration error:  No realms have been configured!  One or more realms must be present to execute an authentication attempt.
	at org.apache.shiro.authc.pam.ModularRealmAuthenticator.assertRealmsConfigured(ModularRealmAuthenticator.java:161)
	at org.apache.shiro.authc.pam.ModularRealmAuthenticator.doAuthenticate(ModularRealmAuthenticator.java:264)
	at org.apache.shiro.authc.AbstractAuthenticator.authenticate(AbstractAuthenticator.java:198)
	at org.apache.shiro.mgt.AuthenticatingSecurityManager.authenticate(AuthenticatingSecurityManager.java:106)
	at org.apache.shiro.mgt.DefaultSecurityManager.login(DefaultSecurityManager.java:275)
	at org.apache.shiro.subject.support.DelegatingSubject.login(DelegatingSubject.java:260)
	at com.yas.MyApplication.test(MyApplication.java:40)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Preprocessor Symbols setting error: error: redefinition of enumerator

The error information is as follows:

../../../../GD32F10x_ Firmware_ Library/CMSIS/GD/GD32F10x/Include\gd32f10x.h(168): error: redefinition of enumerator ‘USBD_ HP_ CAN0_ TX_ IRQn’

../../../../GD32F10x_ Firmware_ Library/CMSIS/GD/GD32F10x/Include\gd32f10x.h(169): error: redefinition of enumerator ‘USBD_ LP_ CAN0_ RX0_ IRQn’

Cause of problem:

Preprocessor symbols should be set to gd32f10x_ MD, but it is set to gd32f10x_ HD

Analysis description:

Preprocessor symbols

Preprocessor symbols means preprocessing symbols, which is equivalent to macro definitions. When we use the gd32 firmware library, because the firmware library contains the definitions of the whole series of GD microcontrollers. At this time, the define box can be used as a global macro definition, that is, select which part of the definitions and resources in the firmware library I want to adopt.

USE_STDPERIPH_DRIVER

It literally means “use standard peripheral driver”. Adding “use_stdperiph_driver” to the C/C + + predefined allows “use standard peripheral driver”. As for the added “gd32f10x_hd”, it can also be explained in the file “gd32f10x. H” through function search as described above. In fact, it also switches some definitions of corresponding hardware.

GD32F10X_HD&GD32F10X_MD

In fact, it defines the capacity of the chip

/* define GD32F10x */
#if !defined (GD32F10X_MD) && !defined (GD32F10X_HD) && !defined (GD32F10X_XD) && !defined (GD32F10X_CL)
  /* #define GD32F10X_MD */     /*!< GD32F10X_MD: GD32 Medium density devices */
  /* #define GD32F10X_HD */     /*!< GD32F10X_HD: GD32 High density Value Line devices */  
  /* #define GD32F10X_XD */     /*!< GD32F10X_XD: GD32 Extra density devices */
  /* #define GD32F10X_CL */     /*!< GD32F10X_CL: GD32 Connectivity line devices */  
#endif /* define GD32F10x */

[Solved] Jekyll Install Error: cannot load such file — webrick (LoadError)

Jekyll install cannot load such file – webrick (LoadError)

catalogue

Jekyll installation cannot load such file — webrick (LoadError) fast track problem background, problem analysis and solution summary

Express Lane

bundle add webrick

Problem background

I use archlinux. Recently, on a whim, I wanted to build a blog on GitHub pages. I looked for it and found two mainstream ones, one is Jekyll and the other is hexo. I heard that the previous one has richer functions, but the syntax is not friendly to programmers, and someone around me uses hexo, but I chose the former, which has rich functions and attracts me more.
but I followed the quick start on the home page

  ~ $ gem install bundler jekyll

  ~ $ jekyll new my-awesome-site

  ~ $ cd my-awesome-site

  ~/my-awesome-site $ bundle exec jekyll serve

# => Now browse to http://localhost:4000

When starting the service in the last step, it reports an error

cannot load such file -- webrick (LoadError)

Problem analysis

After checking a bunch of things on the Internet, we finally found the answer from the official website. The problem is solved by the official documents and is
UE (which tells us that the official documents and GitHub issue are preferred for problems). Through the official website, we can know that we can solve the problem by running bundle add webrick : QuickStart https://jekyllrb.com/docs/,

From the answer given in the issue link on the official website, we can know that ruby3.0.0 and above will no longer bring their own webrick and need to be manually added to the environment

Solution:

Add webrick to dependency: bundle add webrick
this should be implemented in the project

In addition, I tossed around some things, which should not have much to do with the solution of the problem
if webrick does not exist, I can use gem installation: gem install webrick
in addition, I also installed GitHub pages: gem install GitHub pages

Summary

Read more official documents and turn to issue

Error creating bean with name ‘dataSourceScriptDatabaseInitializer‘ defined in class path resource [

Error creating bean with name ‘dataSourceScriptDatabaseInitializer’ defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method ‘dataSourceScriptDatabaseInitializer’ parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘dataSource’ defined in class path resource

Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource

The reason for my error is that I made an error when using @springboottest automatic injection when I first learned spring data JPA

@SpringBootTest

//springbootTest The server is not turned on by default,

public class MainTest {
    @Autowired
UserRepository userRepository;

@Test
    void t1(){
    System.out.println(userRepository);
}
}

I searched the Internet for several hours and debugged it. I found that the datasource was always empty, because it was tested and run in the test method at that time, and the errors given were always the same as above. However, I clearly configured the database in application.yml, and later found it during overall debugging, Failed to load driver class com.mysql.cj.jdbc.driver in either of hikariconfig class loader or thread context classloader

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.25</version>
        </dependency>

Of course, it may also be due to other errors. If you also encounter this error, you can see whether you have added MySQL dependencies to your dependencies

[WordPress Error] Fatal error undefined function is_network_admin()

Fatal error undefined function is_network_admin()

Problem Description:

When you upgrade WordPress, a fatal error undefined function is displayed when you try to log in_network_Admin() fatal error.

Solution: upgrade manually

This error is caused by the WordPress upgrade failure. Try upgrading manually.

1. Download the latest WordPress package and unzip it.

2. Back up your current WordPress.

3. Rename the WP includes and WP admin directories to WP includes.bak and wp-admin.bak.

4. Upload WP includes and WP admin directories to the server via FTP.

5. Upload the contents of the new WP content directory to the corresponding location on the server.

6. Upload other files to the WordPress root directory.

7. Delete the. Maintenance file through FTP.

8. Log in to WordPress again and you will see a link like http://your domain name/WordPress/WP admin/upgrade.php. Follow the instructions.

9. Empty the cache and see if you have taken effect.

ProgrammerAH

Programmer Guide, Tips and Tutorial