Linuxeden开源社区Apache UIMA DUCC 2.2.1 发布，DUCC 是为分布式 UIMA 集群计算服务的，是集群管理系统，提供工具链，管理和调度设施。
此版本带来了一些改进和 bug 修复：
- The userid of a privileged DUCC installation does not have to be “ducc”
- ducc-mon login can be used on systems where users do not have password login
- The DUCC head-node daemons may be moved to another host without breaking working applications
- The deployment descriptor for a UIMA-AS service can be loaded from the classpath
- Interactive applications run correctly with viaducc (fixed lost inputs)
- Files created by DUCC jobs inherit the permissions of the launching shell’s umask.
- DUCC performance breakdown for scaled synchronous pipelines is now correct
- Fixed javadoc method headers to enable ducc build with java 8
- Fixed JP communication threads wait logic when JD returns no work
- GC stats not available sometimes from remote JP
详细改进请看：
https://uima.apache.org/d/uima-ducc-2.2.1/issuesFixed/jira-report.html
转自 http://www.oschina.net/news/88384/apache-uima-ducc-2-2-1