Cache error when using the app engine, but locally it works!

Question

My application SpringBoot works locally, but when I do deploy in the Appengine she did not over because of the error 500, I am using an implementation of EHCACHE in the pattern JSR-107 because from what I read is the only cache pattern format that the AppEngine supports. At the end of the deploy the following Stacktrace is generated in my records section.

Uncaught exception from servlet
java.util.ServiceConfigurationError: javax.cache.spi.CachingProvider: Provider org.ehcache.jsr107.EhcacheCachingProvider could not be instantiated
    at java.util.ServiceLoader.fail(ServiceLoader.java:232)
    at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
    at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
    at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
    at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
    at javax.cache.Caching$CachingProviderRegistry$1.run(Caching.java:438)
    at javax.cache.Caching$CachingProviderRegistry$1.run(Caching.java:432)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.cache.Caching$CachingProviderRegistry.getCachingProviders(Caching.java:432)
    at javax.cache.Caching$CachingProviderRegistry.getCachingProviders(Caching.java:400)
    at javax.cache.Caching.getCachingProviders(Caching.java:178)
    at org.springframework.boot.autoconfigure.cache.JCacheCacheConfiguration$JCacheProviderAvailableCondition.getMatchOutcome(JCacheCacheConfiguration.java:203)
    at org.springframework.boot.autoconfigure.condition.AbstractNestedCondition$MemberOutcomes.getConditionOutcome(AbstractNestedCondition.java:191)
    at org.springframework.boot.autoconfigure.condition.AbstractNestedCondition$MemberOutcomes.<init>(AbstractNestedCondition.java:184)
    at org.springframework.boot.autoconfigure.condition.AbstractNestedCondition$MemberConditions.lambda$getMatchOutcomes$0(AbstractNestedCondition.java:162)
    at java.util.Map.forEach(Map.java:630)
    at java.util.Collections$UnmodifiableMap.forEach(Collections.java:1505)
    at org.springframework.boot.autoconfigure.condition.AbstractNestedCondition$MemberConditions.getMatchOutcomes(AbstractNestedCondition.java:162)
    at org.springframework.boot.autoconfigure.condition.AbstractNestedCondition$MemberMatchOutcomes.<init>(AbstractNestedCondition.java:81)
    at org.springframework.boot.autoconfigure.condition.AbstractNestedCondition.getMatchOutcome(AbstractNestedCondition.java:65)
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108)
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader$TrackedConditionEvaluator.shouldSkip(ConfigurationClassBeanDefinitionReader.java:441)
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:128)
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:328)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)
    at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:155)
    at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:135)
    at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:87)
    at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:172)
    at org.eclipse.jetty.plus.annotation.ContainerInitializer.callStartup(ContainerInitializer.java:140)
    at org.eclipse.jetty.annotations.ServletContainerInitializersStarter.doStart(ServletContainerInitializersStarter.java:63)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:330)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1406)
    at com.google.apphosting.runtime.jetty9.AppEngineWebAppContext.startWebapp(AppEngineWebAppContext.java:175)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1368)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:778)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:262)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:522)
    at com.google.apphosting.runtime.jetty9.AppEngineWebAppContext.doStart(AppEngineWebAppContext.java:120)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at com.google.apphosting.runtime.jetty9.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:240)
    at com.google.apphosting.runtime.jetty9.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:178)
    at com.google.apphosting.runtime.jetty9.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:120)
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest(JavaRuntime.java:722)
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest(JavaRuntime.java:685)
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:655)
    at com.google.apphosting.runtime.JavaRuntime$NullSandboxRequestRunnable.run(JavaRuntime.java:847)
    at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:270)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IncompatibleClassChangeError: class org.ehcache.jsr107.Eh107CacheManager has class javax.cache.CacheManager as interface
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at com.google.apphosting.runtime.ApplicationClassLoader.findClass(ApplicationClassLoader.java:135)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2673)
    at java.lang.Class.getConstructor0(Class.java:3077)
    at java.lang.Class.newInstance(Class.java:413)
    at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
    ... 57 more

I am using the following CACHE dependencies:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
    <version>${springframework.version}</version>
</dependency>
<!-- EH CACHE -->
<dependency>
    <groupId>org.ehcache</groupId>
    <artifactId>ehcache</artifactId>
    <version>3.5.2</version>
</dependency>
<!-- JCACHE PARA O PADRÃO JSR 107 -->
<dependency>
    <groupId>javax.cache</groupId>
    <artifactId>cache-api</artifactId>
    <version>1.0.0</version>
</dependency>

This is my ehcache configuration file:

<config 
    xmlns:jsr107='http://www.ehcache.org/v3/jsr107'
    xmlns='http://www.ehcache.org/v3'>

    <service>
        <jsr107:defaults>
            <jsr107:cache name="consultarPorEmail"
                template="heap-cache" />
        </jsr107:defaults>
    </service>

    <cache-template name="heap-cache">
        <resources>
            <heap unit="entries">2000</heap>
            <offheap unit="MB">100</offheap>
        </resources>
    </cache-template>
</config>

And here are the jcache settings for the application.properties file:

spring.cache.jcache.config=classpath:ehcache.xml 
spring.cache.cache-names=consultarPorEmail  

I’ve been stuck in this problem for days, if you could please help me...

Answer 1

Hello the problem was in a dependency conflict, the EHCACHE dependency was giving conflict with JCACHE dependency,

<dependency>
    <groupId>org.ehcache</groupId>
    <artifactId>ehcache</artifactId>
    <version>3.5.2</version>
</dependency>
<!-- JCACHE PARA O PADRÃO JSR 107 -->
<dependency>
    <groupId>javax.cache</groupId>
    <artifactId>cache-api</artifactId>
    <version>1.0.0</version>
</dependency>

Then it was enough to delete the dependency of EHCACHE that worked, and then stay this way:

<dependency>
    <groupId>javax.cache</groupId>
    <artifactId>cache-api</artifactId>
    <version>1.0.0</version>
</dependency>

Only this did not solve 100% of my problems, since the stack trace disappeared, however the error 500 still occurs, as soon as I can solve this other problem I come back and put the solution.