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Posted to dev@pig.apache.org by "Joanlynn LIN (JIRA)" <ji...@apache.org> on 2016/12/13 14:55:59 UTC
[jira] [Updated] (PIG-5076) Pig 0.15.0 cannot STORE the same alias
onto HDFS and Mysql both?
[ https://issues.apache.org/jira/browse/PIG-5076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joanlynn LIN updated PIG-5076:
------------------------------
Summary: Pig 0.15.0 cannot STORE the same alias onto HDFS and Mysql both? (was: Pig 0.15.0 cannot STORE the same alias into HDFS and Mysql both?)
> Pig 0.15.0 cannot STORE the same alias onto HDFS and Mysql both?
> ----------------------------------------------------------------
>
> Key: PIG-5076
> URL: https://issues.apache.org/jira/browse/PIG-5076
> Project: Pig
> Issue Type: Bug
> Components: piggybank
> Affects Versions: 0.15.0
> Environment: Pig 0.15.0; hadoop 2.7.1;
> Reporter: Joanlynn LIN
>
> I am using Pig 0.15.0 and have found that maybe it does not support STOREing an alias onto HDFS and Mysql both. the question is simplified as follows:
> first, I have a data file on hdfs://tmp/file, which contains:
>
> 1046074327,40986
> 1473299786,1
> then, I created a Mysql table db_test, whose schema is:
> CREATE TABLE `db_test` (
> `app_id` bigint(20) NOT NULL,
> `cnt` bigint(20) NOT NULL
> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
> then I have written a Pig script which runs in mapreduce mode on Hadoop 2.7.1, and the script contains:
> REGISTER '/path/to/mysql-connector-java-5.1.38-bin.jar';
> %declare DBHOST '127.0.0.1'
> %declare DBPORT '3306'
> %declare DATABASE 'test'
> %declare USERNAME 'root'
> %declare PASSWORD 'toor'
> a = load '/tmp/file' USING PigStorage(',') AS (id:long, cnt:long);
> STORE a INTO '/tmp/db_test2' USING PigStorage(',');
> STORE a INTO 'db_test' USING org.apache.pig.piggybank.storage.DBStorage('com.mysql.jdbc.Driver',
> 'jdbc:mysql://$DBHOST:$DBPORT/$DATABASE?useUnicode=true&characterEncoding=utf-8',
> '$USERNAME', '$PASSWORD',
> 'REPLACE INTO db_test (id, cnt) VALUES (?,?)');
> however, the second STORE will never work, without any error reported. However, if I comment the first STORE line, the second STORE will work! What a magic!
> I have tried to use Pig 0.16.0 in local mode on my own host and it can even not instantiate mysql:
> Caused by: java.lang.RuntimeException: could not instantiate 'org.apache.pig.piggybank.storage.DBStorage' with arguments '[com.mysql.jdbc.Driver, jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8, root, toor, REPLACE INTO db_test (app_id, cnt) VALUES (?,?)]'
> at org.apache.pig.impl.PigContext.instantiateFuncFromSpec(PigContext.java:770)
> at org.apache.pig.parser.LogicalPlanBuilder.buildStoreOp(LogicalPlanBuilder.java:988)
> ... 17 more
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at org.apache.pig.impl.PigContext.instantiateFuncFromSpec(PigContext.java:738)
> ... 18 more
> Caused by: java.lang.RuntimeException: Can't load DB Driver
> at org.apache.pig.piggybank.storage.DBStorage.<init>(DBStorage.java:82)
> at org.apache.pig.piggybank.storage.DBStorage.<init>(DBStorage.java:71)
> ... 23 more
> Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:264)
> at org.apache.pig.piggybank.storage.DBStorage.<init>(DBStorage.java:79)
> ... 24 more
> The 'instantiate' problem may be due to my environment settings, and I will keep trying.
> And can somebody help me with the 'two STORE' problem? Would it possibly be a bug?
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