CDH기준으로 `/etc/hadoop/conf/hadoop-env.sh` 설정이 세팅된 상태인데 이런 오류가 난다면?
클라이언트상의 문제이다.
하둡 2번노드에서는 이런오류가 났지만, 하둡1번노드에서는 문제가 없었다.
환경변수 HADOOP_CLASSPATH 를 잡아주면 해결되는듯 싶다.
hive> set hive.execution.engine=tez;
hive> select count(*) from sample;
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tez/dag/api/SessionNotRunning
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2532)
at java.lang.Class.getConstructor0(Class.java:2842)
at java.lang.Class.newInstance(Class.java:345)
at org.apache.hadoop.hive.ql.exec.TaskFactory.get(TaskFactory.java:136)
at org.apache.hadoop.hive.ql.exec.TaskFactory.get(TaskFactory.java:150)
at org.apache.hadoop.hive.ql.parse.GenTezProcContext.<init>(GenTezProcContext.java:160)
at org.apache.hadoop.hive.ql.parse.TezCompiler.generateTaskTree(TezCompiler.java:325)
at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:204)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10265)
at org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:192)
at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:222)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:423)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:307)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1112)
at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1160)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1049)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1039)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:207)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:159)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:370)
at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:756)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:615)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: org.apache.tez.dag.api.SessionNotRunning
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 30 more
예를들어, tez 라이브러리랑 jar가 풀린 폴더가 /home/tez/tez-jars 라면 이렇게 등록주면
export TEZ_JARS=/home/tez/tez-jars
export TEZ_CONF_DIR=/home/tez/tez-jars
export HADOOP_CLASSPATH=${HADOOP_CLASSPATH}:${TEZ_CONF_DIR}:${TEZ_JARS}/*:${TEZ_JARS}/lib/*
돌아가야 할것이다.