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From Jason Dere <jd...@hortonworks.com>
Subject Re: Class not found exception from serde
Date Mon, 24 Feb 2014 22:40:23 GMT
I think TableDesc may not be using the right class loader here when it's trying to get the
class - other parts of the code specify the class loader to use but in this context it does
not.  I've opened https://issues.apache.org/jira/browse/HIVE-6495.

On Feb 23, 2014, at 4:05 AM, Andreas Koch <andreas.koch1974@gmail.com> wrote:

> 
> I am trying to upgrade from Hive 0.10 to 0.12, but I am stuck trying to debug an error
I keep getting. I have a couple of SerDes that I have developed, but when I try to query tables
with these SerDes I get a ClassNotFoundException for the SerDe class. I know that the jar
files have been loaded OK, because I can create tables with these SerDes, but when I try to
query the table Hive throws an exception. I know that the SerDe interface that I use is now
deprecated and I have also experimented with extending the AbstractSerDe class in stead, but
I get the same behaviour.
> 
> Any ideas?
> 
> Thanks,
> 
> Andreas
> 
> 
> FAILED: RuntimeException org.apache.hadoop.hive.ql.metadata.HiveException: Failed with
exception java.lang.ClassNotFoundException: my.serde.ColonSerdejava.lang.RuntimeException:
java.lang.ClassNotFoundException: my.serde.ColonSerde
>     at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializerClass(TableDesc.java:68)
>     at org.apache.hadoop.hive.ql.exec.FetchOperator.getRowInspectorFromTable(FetchOperator.java:231)
>     at org.apache.hadoop.hive.ql.exec.FetchOperator.getOutputObjectInspector(FetchOperator.java:608)
>     at org.apache.hadoop.hive.ql.exec.FetchTask.initialize(FetchTask.java:80)
>     at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:497)
>     at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:352)
>     at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:995)
>     at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1038)
>     at org.apache.hadoop.hive.ql.Driver.run(Driver.java:931)
>     at org.apache.hadoop.hive.ql.Driver.run(Driver.java:921)
>     at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:268)
>     at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:220)
>     at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:422)
>     at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:790)
>     at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:684)
>     at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:623)
>     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.main(RunJar.java:212)
> Caused by: java.lang.ClassNotFoundException: my.serde.ColonSerde
>     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)
>     at java.lang.Class.forName0(Native Method)
>     at java.lang.Class.forName(Class.java:190)
>     at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializerClass(TableDesc.java:66)
>     ... 20 more
> 


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