Hi, In the version of Hadoop 2.7.0, It has the following note:
*This release drops support for JDK6 runtime and works with JDK 7+ only. However, Hama it has support of JDK6. Will not cause incompatibility problems in some scenarios? Thanks! 2015-05-20 21:40 GMT-03:00 Edward J. Yoon <[email protected]>: > I tried to compile with hadoop 2.7.0 version and received following error: > > [ERROR] Failed to execute goal > org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile > (default-compile) on project hama-core: Compilation failure > [ERROR] > > /media/edward/disk/home/eddieyoon/workspace/hama-trunk/core/src/main/java/or > g/apache/hama/http/HttpServer.java:[509,38] error: incompatible types: > PrintWriter cannot be converted to PrintStream > > They changed interface again[1]. I suggest that we use our own > ReflectionUtils. > > 1. > > https://hadoop.apache.org/docs/current/api/org/apache/hadoop/util/Reflection > Utils.html > > -- > Best Regards, Edward J. Yoon > > > >
