Redis Connection failure exception received when trying to run Spring-cloud-data-flow server in docker container

Question

: Failed to perform redis operation.

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
    at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:204) ~[spring-data-redis-1.8.4.RELEASE.jar!/:na]
    at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:348) ~[spring-data-redis-1.8.4.RELEASE.jar!/:na]
    at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:129) ~[spring-data-redis-1.8.4.RELEASE.jar!/:na]
    at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:92) ~[spring-data-redis-1.8.4.RELEASE.jar!/:na]
    at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:79) ~[spring-data-redis-1.8.4.RELEASE.jar!/:na]
    at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:194) [spring-data-redis-1.8.4.RELEASE.jar!/:na]
    at org.springframework.analytics.retry.RedisRetryTemplate.access$101(RedisRetryTemplate.java:34) [spring-analytics-1.1.3.RELEASE.jar!/:na]
    at org.springframework.analytics.retry.RedisRetryTemplate$1.doWithRetry(RedisRetryTemplate.java:70) ~[spring-analytics-1.1.3.RELEASE.jar!/:na]
    at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:286) [spring-retry-1.2.0.RELEASE.jar!/:na]
    at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:179) [spring-retry-1.2.0.RELEASE.jar!/:na]
    at org.springframework.analytics.retry.RedisRetryTemplate.execute(RedisRetryTemplate.java:63) [spring-analytics-1.1.3.RELEASE.jar!/:na]

Answer 1

This is because the SCDF server receives requests to fetch data from analytics repository (which is redis by default) and you don't have Redis running as expected by the SCDF server. One such case would be accessing the UI analytics tab.

You can also disable anlaytics features by setting spring.cloud.dataflow.features.analytics-enabled to false.

This is something related to https://github.com/spring-cloud/spring-cloud-dataflow/issues/1636.