将上下文 LOB 创建禁用为 createClob()方法会抛出错误

As you noticed, this exception isn't a real problem. It happens during the boot, when Hibernate tries to retrieve some meta information from the database. If this annoys you, you can disable it:

hibernate.temp.use_jdbc_metadata_defaults false

Looking at the comments in the source:

Basically here we are simply checking whether we can call the java.sql.Connection methods for LOB creation added in JDBC 4. We not only check whether the java.sql.Connection declares these methods, but also whether the actual java.sql.Connection instance implements them (i.e. can be called without simply throwing an exception).

So, it's trying to determine if it can use some new JDBC 4 methods. I guess your driver may not support the new LOB creation method.

Updating JDBC driver to the lastest version removed the nasty error message.

You can download it from here:

http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html

Free registration is required though.

To get rid of the exception

INFO - HHH000424: Disabling contextual LOB creation as createClob() method threw error :java.lang.reflect.InvocationTargetException

In hibernate.cfg.xml file Add below property

<property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>

Check if you are not on a VPN. I had the same issue but realized the db I was connecting to remote!

The problem occurs because of you didn't choose the appropriate JDBC. Just download and use the JDBC for oracle 10g rather than 11g.

Update to this for using Hibernate 4.3.x / 5.0.x - you could just set this property to true:

<prop key="hibernate.jdbc.lob.non_contextual_creation">true</prop>

to get rid of that error message. Same effect but without the "threw exception" detail. See LobCreatorBuilder source for details.

Remove @Temporal annotations if you use it with java.sql.* classes.

Disable this warning by adding property below.

For Spring application:

spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false

Normal JPA:

hibernate.temp.use_jdbc_metadata_defaults=false

In order to hide the exception:

For Hibernate 5.2 (and Spring Boot 2.0), you can either use the use_jdbc_metadata_defaults property that the others pointed out:

# Meant to hide HHH000424: Disabling contextual LOB creation as createClob() method threw error
spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults: false

Or, if you want to not have any side effects from the above setting (there's a comment warning us about some Oracle side effects, I don't know if it's valid or not), you can just disable the logging of the exception like this:

logging:
level:
# Hides HHH000424: Disabling contextual LOB creation as createClob() method threw error
org.hibernate.engine.jdbc.env.internal.LobCreatorBuilderImpl: WARN

If you set:

hibernate.temp.use_jdbc_metadata_defaults: false

it can cause you troubles with PostgreSQL when your table name contains reserved word like user. After insert it will try to find id sequence with:

select currval('"user"_id_seq');

which will obviously fail. This at least with Hibernate 5.2.13 and Spring Boot 2.0.0.RC1. Haven't found other way to prevent this message so now just ignoring it.

Just add below line in application.properties

spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults: false

I hit this error when my web app was started in Linux by user logged in with insufficient access rights. This error

org.hibernate.engine.jdbc.internal.LobCreatorBuilder - HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException

usually preceded by other errors / exceptions, especially from your application server i.e for Tomcat:

org.apache.catalina.LifecycleException: Failed to initialize component ...

or

java.lang.UnsatisfiedLinkError: ... cannot open shared object file: No such file or directory

Solution:

1. Stop your web apps current instance.

2. Login with super user or those with sufficient access rights i.e root

3. Restart your web app or call previous function again.

As mentioned in other comments using

hibernate.temp.use_jdbc_metadata_defaults = false

...will fix the annoying message, but can lead to many other surprising problems. Better solution is just to disable contextual LOB creation with this:

hibernate.jdbc.lob.non_contextual_creation = true

This will cause Hibernate (in my case, its 5.3.10.Final) to skip probing the JDBC driver and just output following message:

HHH000421: Disabling contextual LOB creation as hibernate.jdbc.lob.non_contextual_creation is true

So far it looks like this setting doesn't cause any problems.

For anyone who is facing this problem with Spring Boot 2

by default spring boot was using hibernate 5.3.x version, I have added following property in my pom.xml

<hibernate.version>5.4.2.Final</hibernate.version>

and error was gone. Reason for error is already explained in posts above

When working with Spring boot 2.1.x this warning message appears when starting up the application.

As indicated here, maybe this problem didn't show up in earlier versions because the related property was set to true by default and now it is false:

https://github.com/spring-projects/spring-boot/issues/12007

In consequence, solving this is as simple as adding the following property to the spring application.property file.

spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation = true

I am using hibernate 5.3.17 and it works fine by adding given properties

hibernate.default_entity_mode=dynamic-map
hibernate.temp.use_jdbc_metadata_defaults=true
hibernate.jdbc.lob.non_contextual_creation = true

Thanks

As mentioned by Jacek Prucia, setting the hibernate.temp.use_jdbc_metadata_defaults=false, will bring other "surprising problems", one of them is the batch inserts will stop working..