引入搜索(增强模型Channel)常见问题解决办法

总体描述

引入Oinone的搜索(即Channel模块)后,因错误的配置、缺少配置或者少引入一些Jar包,会出现一些报错。

问题1:启动报类JCTree找不到

具体现象

启动过程可能会出现报错:
java.lang.NoClassDefFoundError: com/sun/tools/javac/tree/JCTree$JCExpression

产生原因

  • 引入Channel模块后,启动过程中会扫描Class包找寻Enhance的注解,Pamirs底层有使用到jdk的tools中的类,
    com/sun/tools/javac/tree/JCTree$JCExpression
  • 特定版本的jdk可能会缺少tools.jar导致启动失败

具体报错

    at org.springframework.boot.loader.Launcher.launch(Launcher.java:107) [pamirs-venus-boot.jar:na]
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [pamirs-venus-boot.jar:na]
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88) [pamirs-venus-boot.jar:na]
Caused by: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: com/sun/tools/javac/tree/JCTree$JCExpression
    at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) ~[na:1.8.0_381]
    at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908) ~[na:1.8.0_381]
    at pro.shushi.pamirs.boot.common.initial.PamirsBootMainInitial.init(PamirsBootMainInitial.java:66) ~[pamirs-boot-api-4.6.10.jar!/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_381]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_381]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_381]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_381]
    at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:305) ~[spring-context-5.2.12.RELEASE.jar!/:5.2.12.RELEASE]
    ... 20 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/sun/tools/javac/tree/JCTree$JCExpression
    at java.lang.Class.forName0(Native Method) ~[na:1.8.0_381]
    at java.lang.Class.forName(Class.java:264) ~[na:1.8.0_381]
    at pro.shushi.pamirs.meta.util.ClassUtils.getClasses(ClassUtils.java:157) ~[pamirs-meta-model-4.6.8.jar!/:na]
    at pro.shushi.pamirs.meta.util.ClassUtils.getClassesByPacks(ClassUtils.java:73) ~[pamirs-meta-model-4.6.8.jar!/:na]
    at pro.shushi.pamirs.channel.core.manager.EnhanceModelScanner.enhanceModel(EnhanceModelScanner.java:51) ~[pamirs-channel-core-4.6.15.jar!/:na]
    at pro.shushi.pamirs.channel.core.init.ChannelSystemBootAfterInit.init(ChannelSystemBootAfterInit.java:31) 

解决办法

  • 方式一【推荐】、配置channel的扫描路径
    pamirs:
    channel:
    packages:
      - com.pamirs.ic
  • 方式二、使用Oracle版本的jdk,确保jdk的lib目录,tools.jar有com/sun/tools/javac/tree/JCTree对应的类

问题2:启动报类JsonProvider找不到

具体报错

如果启动报错信息如下:

Caused by: java.lang.NoClassDefFoundError: jakarta/json/spi/JsonProvider
    at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_181]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_181]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_181]
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_181]

产生原因

  • 项目中只引入了pamirs-channel-core,但未引入elasticsearch相关的包

解决办法

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-client</artifactId>
    <version>8.4.1</version>
</dependency>
<dependency>
    <groupId>jakarta.json</groupId>
    <artifactId>jakarta.json-api</artifactId>
    <version>2.1.1</version>
</dependency>

其他参考:

Oinone引入搜索引擎步骤:https://doc.oinone.top/backend/7235.html

Oinone社区 作者:望闲原创文章,如若转载,请注明出处:https://doc.oinone.top/backend/4513.html

访问Oinone官网:https://www.oinone.top获取数式Oinone低代码应用平台体验

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