Github user hdeadman commented on the issue:
https://github.com/apache/curator/pull/204
They deleted at least one method in guava 21 that curator is still using. I
am trying to use http://github.com/apereo/cas with spring-cloud-zookeeper and I
need to use an older version of guava or I get a NoSuchMethodError error. I can
probably get away with using an older version of guava in CAS but it would be
nice if curator worked with 21.
```java
Caused by: java.lang.NoSuchMethodError:
com.google.common.util.concurrent.MoreExecutors.sameThreadExecutor()Lcom/google/common/util/concurrent/ListeningExecutorService;
at
org.apache.curator.framework.listen.ListenerContainer.addListener(ListenerContainer.java:41)
~[curator-framework-2.10.0.jar:?]
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.start(CuratorFrameworkImpl.java:257)
~[curator-framework-2.10.0.jar:?]
at
org.springframework.cloud.zookeeper.ZookeeperAutoConfiguration.curatorFramework(ZookeeperAutoConfiguration.java:70)
~[spring-cloud-zookeeper-core-1.0.3.RELEASE.jar:1.0.3.RELEASE]
```
Here is where they deleted the deprecated method: [Guava
commit](https://github.com/google/guava/commit/f67ab864bde63fa6602b5688de0440957ffeaa2e#diff-7a493427c77df959295f1d55574dbd50)
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