【发布时间】：2016-04-20 04:09:01
【问题描述】：
当我尝试将我的数据从 Apache Pig 加载或保存到除 CSV 之外的任何内容时出现错误。这是我的猪代码：
REGISTER /usr/local/Cellar/pig/0.15.0/libexec/*.jar
REGISTER /usr/local/Cellar/pig/0.15.0/libexec/lib/*.jar
REGISTER /usr/local/Cellar/hbase/1.1.2/libexec/lib/*.jar
REGISTER /usr/local/Cellar/hadoop/2.7.2/libexec/share/hadoop/common/*.jar
REGISTER /usr/local/Cellar/hadoop/2.7.2/libexec/share/hadoop/common/lib/*.jar
REGISTER /usr/local/Cellar/hadoop/2.7.2/libexec/share/hadoop/mapreduce/*.jar
REGISTER /usr/local/Cellar/hadoop/2.7.2/libexec/share/hadoop/mapreduce/lib/*.jar
REGISTER /usr/local/Cellar/pig/0.15.0/libexec/lib/piggybank.jar
--generated_data = LOAD 'tableHive' USING org.apache.hive.hcatalog.pig.HCatLoader(',') AS (level:chararray, score:INT, attraction:chararray);
generated_data = LOAD 'CSVResults/ireland.csv' USING PigStorage(',') AS (level:chararray, score:INT, attraction:chararray);
DUMP generated_data;
fiveRating = FILTER generated_data BY (float)score>4;
level6 = FILTER fiveRating BY (float)level>5;
groupedbylevel = group level6 by attraction;
countAttractions = FOREACH groupedbylevel {
level6Attractions = CROSS level6.level;
generate group, COUNT(level6Attractions) AS listBylevel6;
};
orderlist = ORDER countAttractions BY listBylevel6 DESC;
limitorder = LIMIT orderlist 20;
STORE limitorder into 'Level6AttractionsIreland-limited2' using PigStorage(',');
STORE countAttractions into 'hbase://Level6AttractionsIreland' USING org.apache.pig.backend.hadoop.hbase.HBaseStorage('Ireland:level Ireland:score Ireland:attraction');
STORE countAttractions INTO 'Level6AttractionsIreland' USING org.apache.pig.backend.hadoop.hbase.HBaseStorage(',');
这是来自猪日志文件的错误：
Pig Stack Trace
---------------
ERROR 2999: Unexpected internal error. java.io.IOException: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.io.IOException: java.lang.reflect.InvocationTargetException
at org.apache.hadoop.hbase.mapreduce.TableOutputFormat.setConf(TableOutputFormat.java:211)
at org.apache.pig.backend.hadoop.hbase.HBaseStorage.getOutputFormat(HBaseStorage.java:928)
at org.apache.pig.newplan.logical.visitor.InputOutputFileValidatorVisitor.visit(InputOutputFileValidatorVisitor.java:69)
at org.apache.pig.newplan.logical.relational.LOStore.accept(LOStore.java:66)
at org.apache.pig.newplan.DepthFirstWalker.depthFirst(DepthFirstWalker.java:64)
at org.apache.pig.newplan.DepthFirstWalker.depthFirst(DepthFirstWalker.java:66)
at org.apache.pig.newplan.DepthFirstWalker.walk(DepthFirstWalker.java:53)
at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:52)
at org.apache.pig.newplan.logical.relational.LogicalPlan.validate(LogicalPlan.java:212)
at org.apache.pig.PigServer$Graph.compile(PigServer.java:1767)
at org.apache.pig.PigServer$Graph.access$300(PigServer.java:1443)
at org.apache.pig.PigServer.execute(PigServer.java:1356)
at org.apache.pig.PigServer.executeBatch(PigServer.java:415)
at org.apache.pig.PigServer.executeBatch(PigServer.java:398)
at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:171)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:234)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:205)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81)
at org.apache.pig.Main.run(Main.java:631)
at org.apache.pig.Main.main(Main.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.io.IOException: java.lang.reflect.InvocationTargetException
at org.apache.hadoop.hbase.client.HConnectionManager.createConnection(HConnectionManager.java:459)
at org.apache.hadoop.hbase.client.HConnectionManager.createConnection(HConnectionManager.java:436)
at org.apache.hadoop.hbase.client.HConnectionManager.getConnection(HConnectionManager.java:317)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:198)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:160)
at org.apache.hadoop.hbase.mapreduce.TableOutputFormat.setConf(TableOutputFormat.java:206)
... 25 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.hadoop.hbase.client.HConnectionManager.createConnection(HConnectionManager.java:457)
... 30 more
Caused by: java.lang.NoClassDefFoundError: org/cloudera/htrace/Trace
at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:218)
at org.apache.hadoop.hbase.zookeeper.ZKUtil.checkExists(ZKUtil.java:481)
at org.apache.hadoop.hbase.zookeeper.ZKClusterId.readClusterIdZNode(ZKClusterId.java:65)
at org.apache.hadoop.hbase.client.ZooKeeperRegistry.getClusterId(ZooKeeperRegistry.java:83)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.retrieveClusterId(HConnectionManager.java:907)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.<init>(HConnectionManager.java:701)
... 35 more
Caused by: java.lang.ClassNotFoundException: org.cloudera.htrace.Trace
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 41 more
================================================================================
如您所见，我已尝试添加每个可能相关的 jar 文件，并且我还删除了除加载和存储命令之外的所有内容，以查看是否是导致它的代码，但我得到了相同的结果。我对 Pig 很陌生，如果这是一个愚蠢的错误，我深表歉意，我已经在其他地方寻找答案，但现阶段对我没有任何帮助。此外，我在本地安装了 Hadoop、HBase 和 Hive 的 Mac 上，我在终端中运行命令“pig -x local test.pig”。任何建议都会很棒，谢谢！
【问题讨论】：
-
Caused by: java.lang.NoClassDefFoundError: org/cloudera/htrace/Trace... 这对你来说意味着什么吗？ -
感谢您的回复，说实话，没有一个是真的。我确实在某个阶段安装了 cloudera 的 VM，我打算将其用于大学项目，但我担心卸载它以防我破坏某些东西。您认为虚拟机可能会导致问题吗？我看到了那个错误，但我认为它是由更接近错误顶部的东西引起的，如果你明白我的意思的话。
-
这是一个虚拟机，所以你不能破坏任何东西。堆栈跟踪中错误的根本原因在底部。这就是为什么它被称为“堆栈”跟踪。错误之后的任何内容都被添加到其他内容的“顶部”。
-
您使用的是 cloudera 还是 hortonworks 虚拟机？根据this post 中的答案，您缺少一些 HBase jar 文件。我不确定您为什么要在 Mac 上运行 Pig 代码（基于
/usr/local/Cellar）。您应该从 VM 运行代码，其中所有环境变量和路径都已正确设置。 -
不，我根本没有使用虚拟机，我已经在 Mac 上安装了 Hadoop 等，如果我在 Mac 上使用 Cloudera 有问题，我只是打算使用它，所以我安装了它，但我没有使用它。我已经在 Mac 上安装了 pig、Hbase 和 Hadoop，并且正在使用它。对不起，如果这令人困惑！
标签： hadoop apache-pig base hcatalog