Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/802#issuecomment-146078424
Could you rebase the patch? The patch causes the following error:
```
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on
project tajo-common: Compilation failure
[ERROR]
/home/hyunsik/Code/tajo/tajo/tajo-common/src/main/java/org/apache/tajo/util/ShutdownHookManager.java:[103,34]
incompatible types: java.util.Set<java.lang.Object> cannot be converted to
java.util.Set<org.apache.tajo.util.ShutdownHookManager.HookEntry>
```
#778 changes the source and target JVM of tajo-common to 1.7. It may cause
this problem, I think.
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