Shoothzj opened a new issue #6117:
URL: https://github.com/apache/skywalking/issues/6117
Please answer these questions before submitting your issue.
- Why do you submit this issue?
- [ ] Bug
___
### Question
Why NPE? Does it matter ? If it's matter, how to fix it.
___
### Bug
- Which version of SkyWalking, OS, and JRE?
Skywalking 8.3.0
OS: ubuntu 20
JRE: tried both version 8 and 11
- Which company or project?
- personal demo
- What happened?
agent-param:
```
-javaagent:/home/akkascala/shoothzj/skywalking/agent/skywalking-agent.jar
-Dskywalking_config=/home/akkascala/master/demo-iot-device-manage/agent.config
-Dskywalking.agent.service_name=device-manage
```
maven dependency:
```xml
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.30</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.13.3</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.13.3</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>2.13.3</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.3.4.RELEASE</version>
<exclusions>
<exclusion>
<artifactId>spring-boot-starter-logging</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.20</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-core</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
</dependencies>
```
in agent log
```
ERROR 2021-01-01 21:47:51:909 main InstMethodsInter : class[class
com.mysql.cj.jdbc.ClientPreparedStatement] before method[setNull] intercept
failure
java.lang.NullPointerException
at
org.apache.skywalking.apm.plugin.jdbc.JDBCPreparedStatementNullSetterInterceptor.beforeMethod(JDBCPreparedStatementNullSetterInterceptor.java:34)
at
org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.intercept(InstMethodsInter.java:76)
at
com.mysql.cj.jdbc.ClientPreparedStatement.setNull(ClientPreparedStatement.java)
at
com.mysql.cj.jdbc.DatabaseMetaDataUsingInfoSchema.getTables(DatabaseMetaDataUsingInfoSchema.java:854)
at
com.zaxxer.hikari.pool.ProxyDatabaseMetaData.getTables(ProxyDatabaseMetaData.java:69)
at
com.zaxxer.hikari.pool.HikariProxyDatabaseMetaData.getTables(HikariProxyDatabaseMetaData.java)
at
org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.getTables(InformationExtractorJdbcDatabaseMetaDataImpl.java:333)
at
org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.getTablesInformation(DatabaseInformationImpl.java:120)
at
org.hibernate.tool.schema.internal.GroupedSchemaMigratorImpl.performTablesMigration(GroupedSchemaMigratorImpl.java:65)
at
org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:207)
at
org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:114)
at
org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184)
at
org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73)
at
org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:316)
at
org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:469)
at
org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1259)
at
org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58)
at
org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)
at
org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391)
at
org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378)
at
org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1790)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516)
at
org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at
org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551)
at
org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
at
org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
at
org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
at
org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
at
com.github.shoothzj.demo.iot.mdevice.manage.MysqlDemo.main(MysqlDemo.java:23)
```
___
### Requirement or improvement
That's my demo
[demo-iot-device-manage.zip](https://github.com/apache/skywalking/files/5759016/demo-iot-device-manage.zip)
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