Spring Data JPA with Redis: unable to store nested Map

I'm trying to save the below SessionEntity payload in a Redis datastore using Spring Data Redis via an implementation of the CrudRepository:

{
    "id": "59e05a73-064e-4344-9a3d-0565b344183c",
    "users": [{
            "id": "a386d740-ea88-4ec8-8bec-303b5a0b2c14",
            "title": "john",
            "sessionId": "59e05a73-064e-4344-9a3d-0565b344183c"
        },
        {
            "id": "020c8200-1516-458f-b8e2-f87f26397fb5",
            "title": "john",
            "sessionId": "59e05a73-064e-4344-9a3d-0565b344183c"
        }
    ],
    "chatLog": {
        "2019-11-20 09:12:33.954": {
            "john": "hello"
        }
    }
}

SessionEntity.java

@Getter
@Builder
@RedisHash("Session")
public class SessionEntity {

    private String id;
    private List<UserEntity> users;

    private Map<String, Map<String,String>> chatLog;
}

UserEntity.java

@Builder
@Getter
@RedisHash("User")
public class UserEntity {
    private String id;
    private String title;
    private String sessionId;
}

Session.java

@Builder
@Getter
public class Session {
    private String id;
    private List<User> users;
    private Map<String, Map<String,String>> chatLog;

    ...

    public static SessionEntity mapToEntity(Session session) {
        List<UserEntity> userEntities = new ArrayList<>();
        for(User user : session.getUsers()) {
            userEntities.add(
                    UserEntity
                        .builder()
                        .id(user.getId())
                        .title(user.getTitle())
                        .sessionId(user.getSessionId())
                        .build()
            );
        }


        return SessionEntity
                    .builder()
                    .id(session.getId())
                    .chatLog(session.getChatLog())
                    .users(userEntities)
                    .build();
    }
}

RedisDatastoreAdapter.java:

@Repository
@Profile("cloud")
@Slf4j
public class RedisDatastoreAdapter implements ISessionDatastorePort  {

    private RedisDAO redisDAO;

    public RedisDatastoreAdapter(RedisDAO redisDAO) {
        this.redisDAO = redisDAO;
    }

    @Override
    public void save(Session session) {

        redisDAO.save(Session.mapToEntity(session));
    }

    ...
}

ISessionDatastorePort.java

public interface  ISessionDatastorePort {
    void save(Session session);

    ...
}

RedisDao.java

@Repository
public interface RedisDAO extends CrudRepository<SessionEntity, String> {
}

When the "chatLog" field (of type Map<String, Map<String,String>>) is populated with an entry, Spring Data throws an ArrayOutOfBoundsException from the following Spring Data ParameterizedTypeInformation method at the type.getActualTypeArguments()[0] statement:

2019-11-20 09:13:17.217 ERROR 70869 --- [io-8080-exec-10] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataRetrievalFailureException: Index 0 out of bounds for length 0; nested exception is java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0] with root cause

java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
    at org.springframework.data.util.ParameterizedTypeInformation.doGetComponentType(ParameterizedTypeInformation.java:159) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.Lazy.getNullable(Lazy.java:212) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.Lazy.orElse(Lazy.java:149) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.TypeDiscoverer.getComponentType(TypeDiscoverer.java:372) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.TypeDiscoverer.getActualType(TypeDiscoverer.java:314) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.ParentTypeAwareTypeInformation.getActualType(ParentTypeAwareTypeInformation.java:29) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.model.AbstractPersistentProperty.lambda$new$5(AbstractPersistentProperty.java:88) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.Lazy.getNullable(Lazy.java:212) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.util.Lazy.get(Lazy.java:94) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.model.AbstractPersistentProperty.isEntity(AbstractPersistentProperty.java:248) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.model.AbstractPersistentProperty.getPersistentEntityTypes(AbstractPersistentProperty.java:150) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:548) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:506) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:699) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:374) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:248) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:85) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.convert.MappingContextTypeInformationMapper.lambda$createAliasFor$0(MappingContextTypeInformationMapper.java:69) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1705) ~[na:na]
    at org.springframework.data.convert.MappingContextTypeInformationMapper.createAliasFor(MappingContextTypeInformationMapper.java:67) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.convert.DefaultTypeMapper.getAliasFor(DefaultTypeMapper.java:231) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.convert.DefaultTypeMapper.writeType(DefaultTypeMapper.java:212) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.convert.DefaultTypeMapper.writeType(DefaultTypeMapper.java:201) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:577) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.convert.MappingRedisConverter.writeMap(MappingRedisConverter.java:816) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:599) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:355) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:583) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:393) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:108) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.RedisKeyValueAdapter.put(RedisKeyValueAdapter.java:208) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.keyvalue.core.KeyValueTemplate.lambda$update$1(KeyValueTemplate.java:204) ~[spring-data-keyvalue-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.keyvalue.core.KeyValueTemplate.execute(KeyValueTemplate.java:345) ~[spring-data-keyvalue-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.keyvalue.core.KeyValueTemplate.update(KeyValueTemplate.java:204) ~[spring-data-keyvalue-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.redis.core.RedisKeyValueTemplate.update(RedisKeyValueTemplate.java:179) ~[spring-data-redis-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.keyvalue.repository.support.SimpleKeyValueRepository.save(SimpleKeyValueRepository.java:104) ~[spring-data-keyvalue-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:371) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:204) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:657) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:621) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:605) ~[spring-data-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at com.sun.proxy.$Proxy113.save(Unknown Source) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at com.sun.proxy.$Proxy113.save(Unknown Source) ~[na:na]
    at com.beachsleeper.connectionchat.repository.adapter.RedisDatastoreAdapter.save(RedisDatastoreAdapter.java:26) ~[classes/:na]
    at com.beachsleeper.connectionchat.repository.adapter.RedisDatastoreAdapter$$FastClassBySpringCGLIB$$66b53e68.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689) ~[spring-aop-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at com.beachsleeper.connectionchat.repository.adapter.RedisDatastoreAdapter$$EnhancerBySpringCGLIB$$9537f3db.save(<generated>) ~[classes/:na]
    at com.beachsleeper.connectionchat.domain.ConnectionPool.removeUserFromSession(ConnectionPool.java:54) ~[classes/:na]
    at com.beachsleeper.connectionchat.api.SessionController.removeUserFromSession(SessionController.java:44) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doDelete(FrameworkServlet.java:931) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:666) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:108) ~[spring-boot-actuator-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1579) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.27.jar:9.0.27]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

ParameterizedTypeInformation.java

@Override
    @Nullable
    protected TypeInformation<?> doGetComponentType() {
        return createInfo(type.getActualTypeArguments()[0]);
    }

This exception is not thrown if the chatLog field has not been populated, and saving works successfully in this case. It would appear there is some reflection magic happening in the doGetComponentType() method that does not seem to be working; I'm wondering if this is a bug with Spring Data Redis or if I'm missing something obvious...