Author Archives: Robins

JNI ERROR (2354): JNI connection is NULL [How to Solve]

JNI error (2354) encountered by tdengine during springboot integration: JNI connection is null
possible problems are as follows
1. The client version of tdengine is inconsistent with the server version
2. The server version and jdbc driver version are not matched. The following figure shows the version correspondence figure

io.lettuce.core.RedisCommandExecutionException: errorCode:50010048

io.lettuce.core.RedisCommandExecutionException: error Code:50010048

Caused by: io.lettuce.core.RedisCommandExecutionException: errorCode:50010048
	at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:135)
	at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:108)
	at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:120)
	at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:111)
	at io.lettuce.core.protocol.CommandWrapper.complete(CommandWrapper.java:59)
	at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:654)
	at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:614)
	at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:565)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	... 1 common frames omitted

An error is reported when calling rediscache. Clean(). The reason may be that redis does not support related commands, such as keys.

Python installs virtualenv through PIP and always reports an error: response.py“, line 438, in _error_catcher yield 

G:\ESP32\esp-idf-release-v4.3>pip install virtualenv
Collecting virtualenv
  Downloading virtualenv-20.7.2-py2.py3-none-any.whl (5.3 MB)
     |█                               | 174 kB 4.5 kB/s eta 0:18:56ERROR: Exception:
Traceback (most recent call last):
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\response.py", line 438, in _error_catcher
    yield
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\response.py", line 519, in read
    data = self._fp.read(amt) if not fp_closed else b""
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read
    data = self.__fp.read(amt)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\http\client.py", line 459, in read
    n = self.readinto(b)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\http\client.py", line 503, in readinto
    n = self.fp.readinto(b)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\socket.py", line 704, in readinto
    return self._sock.recv_into(b)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\ssl.py", line 1241, in recv_into
    return self.read(nbytes, buffer)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\ssl.py", line 1099, in read
    return self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\cli\base_command.py", line 173, in _main
    status = self.run(options, args)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\cli\req_command.py", line 203, in wrapper
    return func(self, options, args)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\commands\install.py", line 315, in run
    requirement_set = resolver.resolve(
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\resolver.py", line 94, in resolve
    result = self._result = resolver.resolve(
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 472, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 341, in resolve
    self._add_to_criteria(self.state.criteria, r, parent=None)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 172, in _add_to_criteria
    if not criterion.candidates:
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\structs.py", line 151, in __bool__
    return bool(self._sequence)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 140, in __bool__
    return any(self)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 128, in <genexpr>
    return (c for c in iterator if id(c) not in self._incompatible_ids)
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 32, in _iter_built
    candidate = func()
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py", line 204, in _make_candidate_from_link
    self._link_candidate_cache[link] = LinkCandidate(
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 295, in __init__
    super().__init__(
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 156, in __init__
    self.dist = self._prepare()
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 227, in _prepare
    dist = self._prepare_distribution()
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\candidates.py", line 305, in _prepare_distribution
    return self._factory.preparer.prepare_linked_requirement(
  File "g:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\operations\prepare.py", line 508, in prepare_linked_requirement
    return self._prepare_linked_requirement(req, parallel

Later, add the path of Python to the system variable

Redis: (error) MOVED 8352 192.168.145.128:6380 [How to Solve]

Problem Description:

Redis set, get and other operations have the following errors

 (error) MOVED 8352 192.168.145.128:6380

Cause analysis:

This is generally caused by the fact that the cluster mode is not set when redis cli is started; After starting the cluster, redis cli logs in as an ordinary user and cannot operate the data in the cluster. You need to add – C to log in as a cluster mode before you can operate.

Solution:

Add – C at startup to start cluster mode

redis-cli -c -p 6379

As shown in the figure below, the operation can be successfully performed

Summary

Login in normal mode: you may directly enter the read host and move redirection will occur when storing data. Therefore, you should log in as a cluster. Add the – C parameter to connect with the cluster policy, and the setting data will be automatically switched to the corresponding write host

KaTeX parse error: No such environment: align

CSDN uses KAtex and does not support align, but can use aligned.

$$\begin{aligned}
\frac{\partial l_n}{\partial w}&=-[\frac{y_n}{\sigma(z)}\sigma'(z)x - \frac{1-y_n}{1-\sigma(z)}\sigma'(z)x] \\
&= \frac{\sigma(z)-y_n}{\sigma(z)[1-\sigma(z)]}\sigma'(z)x \\
\end{aligned}$$

(GROANS)

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\begin{aligned} \frac{\partial l}u n}{\partial w}&=-[\ frac{y}{\sigma(z)}\sigma'(z)x – \frac{y-y n}{1-\sigma(z)}\sigma'(z)x] \\\\\\sigma &= \sigma(z)} frac{\sigma(z)-y}{\sigma(z)[1-\sigma(z)}\sigma'(z)x \\\\end{aligned}

(i)a (i)a (i)a (i)a) a (i)a (i)a)

Syntax Error: (unicode error) ‘unicodeescape’ codec can’t decode bytes in position resolution

Error reporting: syntax error: (Unicode error) ‘Unicode scape’ codec can’t decode bytes in position 2-3: tr

For example, in the file, the file path I passed in is like this

sys.path.append('c:\Users\mshacxiang\VScode_ project\web_ ddt')

Cause analysis: the file path can be read in the windows system, but \ has escape meaning in the Python string. For example, \ t can represent tab and \ n represents line feed. Therefore, we need to take some measures to prevent \ from being interpreted as escape characters. Add r before the path to keep the original value of the character. This solves the problem

sys.path.append(r'c:\Users\mshacxiang\VScode_ project\web_ ddt')

org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1

“C:\Program Files\Java\jdk1.8.0_152\bin\java.exe” -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true “-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\lib\idea_rt.jar=13065:C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\bin” -Dfile.encoding=UTF-8 -classpath “C:\Program Files\Java\jdk1.8.0_152\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\rt.jar;D:\study\Spring\Springboot\target\classes;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-starter-web\2.5.3\spring-boot-starter-web-2.5.3.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-starter\2.5.3\spring-boot-starter-2.5.3.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot\2.5.3\spring-boot-2.5.3.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-autoconfigure\2.5.3\spring-boot-autoconfigure-2.5.3.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-starter-logging\2.5.3\spring-boot-starter-logging-2.5.3.jar;D:\JavaEE\maven\repository\ch\qos\logback\logback-classic\1.2.4\logback-classic-1.2.4.jar;D:\JavaEE\maven\repository\ch\qos\logback\logback-core\1.2.4\logback-core-1.2.4.jar;D:\JavaEE\maven\repository\org\slf4j\slf4j-api\1.7.32\slf4j-api-1.7.32.jar;D:\JavaEE\maven\repository\org\apache\logging\log4j\log4j-to-slf4j\2.14.1\log4j-to-slf4j-2.14.1.jar;D:\JavaEE\maven\repository\org\apache\logging\log4j\log4j-api\2.14.1\log4j-api-2.14.1.jar;D:\JavaEE\maven\repository\org\slf4j\jul-to-slf4j\1.7.32\jul-to-slf4j-1.7.32.jar;D:\JavaEE\maven\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;D:\JavaEE\maven\repository\org\springframework\spring-core\5.3.9\spring-core-5.3.9.jar;D:\JavaEE\maven\repository\org\springframework\spring-jcl\5.3.9\spring-jcl-5.3.9.jar;D:\JavaEE\maven\repository\org\yaml\snakeyaml\1.28\snakeyaml-1.28.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-starter-json\2.5.3\spring-boot-starter-json-2.5.3.jar;D:\JavaEE\maven\repository\com\fasterxml\jackson\core\jackson-databind\2.12.4\jackson-databind-2.12.4.jar;D:\JavaEE\maven\repository\com\fasterxml\jackson\core\jackson-annotations\2.12.4\jackson-annotations-2.12.4.jar;D:\JavaEE\maven\repository\com\fasterxml\jackson\core\jackson-core\2.12.4\jackson-core-2.12.4.jar;D:\JavaEE\maven\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.12.4\jackson-datatype-jdk8-2.12.4.jar;D:\JavaEE\maven\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.12.4\jackson-datatype-jsr310-2.12.4.jar;D:\JavaEE\maven\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.12.4\jackson-module-parameter-names-2.12.4.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-starter-tomcat\2.5.3\spring-boot-starter-tomcat-2.5.3.jar;D:\JavaEE\maven\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.50\tomcat-embed-core-9.0.50.jar;D:\JavaEE\maven\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.50\tomcat-embed-el-9.0.50.jar;D:\JavaEE\maven\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.50\tomcat-embed-websocket-9.0.50.jar;D:\JavaEE\maven\repository\org\springframework\spring-web\5.3.9\spring-web-5.3.9.jar;D:\JavaEE\maven\repository\org\springframework\spring-beans\5.3.9\spring-beans-5.3.9.jar;D:\JavaEE\maven\repository\org\springframework\spring-webmvc\5.3.9\spring-webmvc-5.3.9.jar;D:\JavaEE\maven\repository\org\springframework\spring-aop\5.3.9\spring-aop-5.3.9.jar;D:\JavaEE\maven\repository\org\springframework\spring-context\5.3.9\spring-context-5.3.9.jar;D:\JavaEE\maven\repository\org\springframework\spring-expression\5.3.9\spring-expression-5.3.9.jar;D:\JavaEE\maven\repository\com\alibaba\druid\1.2.6\druid-1.2.6.jar;D:\JavaEE\maven\repository\org\springframework\boot\spring-boot-configuration-processor\2.5.3\spring-boot-configuration-processor-2.5.3.jar;D:\JavaEE\maven\repository\org\projectlombok\lombok\1.18.20\lombok-1.18.20.jar” com.it.Application
21:47:30.987 [main] ERROR org.springframework.boot.SpringApplication – Application run failed
org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1
    at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:218)
    at org.yaml.snakeyaml.reader.StreamReader.ensureEnoughData(StreamReader.java:176)
    at org.yaml.snakeyaml.reader.StreamReader.ensureEnoughData(StreamReader.java:171)
    at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:126)
    at org.yaml.snakeyaml.scanner.ScannerImpl.scanToNextToken(ScannerImpl.java:1198)
    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:308)
    at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:248)
    at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:213)
    at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:165)
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:155)
    at org.yaml.snakeyaml.composer.Composer.checkNode(Composer.java:93)
    at org.yaml.snakeyaml.constructor.BaseConstructor.checkData(BaseConstructor.java:124)
    at org.yaml.snakeyaml.Yaml$1.hasNext(Yaml.java:507)
    at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:198)
    at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:166)
    at org.springframework.boot.env.OriginTrackedYamlLoader.load(OriginTrackedYamlLoader.java:84)
    at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:50)
    at org.springframework.boot.context.config.StandardConfigDataLoader.load(StandardConfigDataLoader.java:54)

    at org.springframework.boot.context.config.StandardConfigDataLoader.load(StandardConfigDataLoader.java:36)
    at org.springframework.boot.context.config.ConfigDataLoaders.load(ConfigDataLoaders.java:107)
    at org.springframework.boot.context.config.ConfigDataImporter.load(ConfigDataImporter.java:128)
    at org.springframework.boot.context.config.ConfigDataImporter.resolveAndLoad(ConfigDataImporter.java:86)
    at org.springframework.boot.context.config.ConfigDataEnvironmentContributors.withProcessedImports(ConfigDataEnvironmentContributors.java:121)
    at org.springframework.boot.context.config.ConfigDataEnvironment.processInitial(ConfigDataEnvironment.java:240)
    at org.springframework.boot.context.config.ConfigDataEnvironment.processAndApply(ConfigDataEnvironment.java:227)
    at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:102)
    at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:94)
    at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:102)
    at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:87)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:82)
    at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:63)
    at java.util.ArrayList.forEach(ArrayList.java:1257)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:117)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:111)
    at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:62)
    at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:374)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:332)
    at org.springframework.boot.SpringApplication.run(SpringApplication.j

LSSchemaConfigureForStore failed with error Error Domain=NSOSStatusErrorDomain Code=-10817 “(null)“ 

LSSchemaConfigureForStore failed with error Error Domain=NSOSStatusErrorDomain Code=-10817 "(null)" UserInfo={_LSFunction=_LSSchemaConfigureForStore, ExpectedSimulatorHash={length = 32, bytes = 0x15dde658 ed2a1267 ab2496d7 34f186ad ... ec431c65 02d68f35 }, _LSLine=409, WrongSimulatorHash={length = 32, bytes = 0xaf25dda9 e45baa35 610eaabd 5bc09901 ... 9cbe61f3 81d7b9d9 }}

  The solution is as follows: