Hi， @胡逸才， I've met the same problem. Add some configs as blow will help you .
env.java.home: /usr/jdk1.8.0_51containerized.master.env.JAVA_HOME: /usr/jdk1.8.0_51containerized.taskmanager.env.JAVA_HOME: /usr/jdk1.8.0_51yarn.taskmanager.env.JAVA_HOME: /usr/jdk1.8.0_51 On Sun, Apr 28, 2019 at 1:58 PM 张军 <zhangjunem...@126.com> wrote: > Thank you for your reminder, I will pay attention to this issue in the > future. > > I read some flink source code and saw that there are a lot of new features > of java8, such as CompletableFuture and Lambda expressions, which causes > flink do not run in jdk 1.7 environment, so you may need to upgrade your > jdk to 1.8. > > > > > > 在 2019年4月28日，上午8:24，126 <zhangjunem...@126.com> 写道： > > > > Flink源码中用到了很多java1.8的特性，所以用jdk1.7是不行的 > > > > 发自我的 iPhone > > > >> 在 2019年4月26日，17:48，胡逸才 <huyc...@163.com> 写道： > >> > >> At present, all YARN clusters adopt JAVA 7 environment. > >> > >> While trying to use FLINK to handle the deployment of flow processing > business scenarios, it was found that FLINK ON YARN mode always failed to > perform a session task. The application log of YARN shows Unsupported > major. minor version 52.0. > >> > >> I tried to add env. java. home: < JDK 1.8PATH > in flink-conf. yaml of > the mailing list solution. And the startup command adds -yD yarn. > taskmanager. env. JAVA_HOME= < JDK1.8PATH>、-yD containerized. master. env. > JAVA_HOME= < JDK1.8PATH>, -yD containerized. taskmanager. env. JAVA_HOME= < > JDK1.8PATH>. Flink session cluster in YARN can not run Application in JAVA > 8 environment. > >> > >> So can I use Flink1.7.X submit Flink session cluster application in > YARN under JAVA 7 environment? > >> > >> > >> > >
