Problem loading application without the need of REDIS

[alkaphreak]

When the persistence and the scheduler are disabled :

spring.mail.scheduler.enabled=false
spring.mail.scheduler.priorityLevels=10
spring.mail.scheduler.persistence.enabled=false
spring.mail.scheduler.persistence.redis.enabled=false
spring.mail.scheduler.persistence.redis.embedded=false
spring.mail.scheduler.persistence.redis.host=localhost
spring.mail.scheduler.persistence.redis.port=6381

This error keeps coming :

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'enableRedisKeyspaceNotificationsInitializer' defined in class path resource [org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfiguration.class]: Invocation of init method failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	...
Caused by: org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	...
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	...
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connexion refusée (Connection refused)
	...
Caused by: java.net.ConnectException: Connexion refusée (Connection refused)
	...

Can you provide a way in the documentation to avoid this ?
I don't need the persistence or scheduling layer and don't want to install a redis instance just to send some mails.

[robertotru]

Hi thanks for writing.

The description of the problem is a little bit vague. Can you provide more context, e.g. version used, java code, etc.

By the way, there is an examples folder with several examples working without REDIS.
E.g., have a look at this one.

[alkaphreak]

Ok, before going further, i will take a look a these examples, maybe i missed something.

[alkaphreak]

Ok, i haven't seen usefull tips to help me.

My pom is with this (when removed, no problem) :

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.6.RELEASE</version>
        <relativePath/>
</parent>
...
<dependency>
            <groupId>it.ozimov</groupId>
            <artifactId>spring-boot-email-core</artifactId>
            <version>0.5.0</version>
</dependency>

My java code just got this, it's a new project :

@SpringBootApplication
@EnableEmailTools
public class IndustryJarvisApplication {
    public static void main(String[] args) {
        SpringApplication.run(IndustryJarvisApplication.class, args);
    }
}

When i launch i got the above errors.

[alkaphreak]

Ok, it's seems that Spring Boot is trying to auto-configure Redis when we load the spring-boot-email-core dependency.

If we don't want to use Redis we need to exclude it from the auto-configuration.

I've found here the solution :

You can add spring.session.store-type=none. It isn't obvious in the doc so I'll update that.
It also 1.4 specific unfortunately. so I am afraid you'll have to exclude the auto-configuration via
properties in 1.3 :

spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.session.SessionAutoConfiguration

And it works.

I think it will be an useful tips to put in the documentation.

Thanks for your help.

[msauza]

There's already docs about spring-session, the error was caused by spring-session and spring-boot-starter-data-redis on classpath, it tried to auto-configure as redis http-sessions store.

Maybe @robertotru could fix this issue by implementing the same auto-config that spring-session does when it found redis as dependency. E.g. @EnableRedisHttpSession -> @EnableRedisEmailPersistence.

There's no email-tools error by redis implementation.

[robertotru]

@alkaphreak @miguelsauza Got it. I will update the doc as soon as possible, or, you can contribute by updating them by yourself: any Pull Request that fixes the issue is more than welcome :)

[msauza]

I tried to reproduce the error just to stay clear but it's not a problem caused by email-tools. As the first stacktrace line indicates: org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfiguration.class.

That class is part of spring-session module and it tries to auto-configure by OnConditional annotation that found spring-boot-starter-data-redis on classpath.

[robertotru]

Thanks a lot for investigating. Yeah your analysis looks convincing. Unfortunately I have no time at the moment to run some tests.

I'll keep this open for correctness.

[evandongen]

I'm having the same problem with spring boot 1.5.4. It isn't very obvious, but when using the /health endpoint of spring actuator things break.

For now I've resolved it by excluding the redis dependencies, but that doesn't feel like a real solution:
<exclusions> <exclusion> <artifactId>spring-boot-starter-data-redis</artifactId> <groupId>org.springframework.boot</groupId> </exclusion> <exclusion> <artifactId>embedded-redis</artifactId> <groupId>it.ozimov</groupId> </exclusion> </exclusions>

[robertotru]

@evandongen just to know, which OS are you using?

[evandongen]

I'm using ubuntu 14.04, running with IntelliJ 2017.1.4 in Tomcat 7.0.751