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From Jason Dere <>
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

On Feb 23, 2014, at 4:05 AM, Andreas Koch <> 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(
>     at org.apache.hadoop.hive.ql.exec.FetchOperator.getRowInspectorFromTable(
>     at org.apache.hadoop.hive.ql.exec.FetchOperator.getOutputObjectInspector(
>     at org.apache.hadoop.hive.ql.exec.FetchTask.initialize(
>     at org.apache.hadoop.hive.ql.Driver.compile(
>     at org.apache.hadoop.hive.ql.Driver.compile(
>     at org.apache.hadoop.hive.ql.Driver.compileInternal(
>     at org.apache.hadoop.hive.ql.Driver.runInternal(
>     at
>     at
>     at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(
>     at org.apache.hadoop.hive.cli.CliDriver.processCmd(
>     at org.apache.hadoop.hive.cli.CliDriver.processLine(
>     at org.apache.hadoop.hive.cli.CliDriver.executeDriver(
>     at
>     at org.apache.hadoop.hive.cli.CliDriver.main(
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at sun.reflect.NativeMethodAccessorImpl.invoke(
>     at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>     at java.lang.reflect.Method.invoke(
>     at org.apache.hadoop.util.RunJar.main(
> Caused by: java.lang.ClassNotFoundException: my.serde.ColonSerde
>     at$
>     at$
>     at Method)
>     at
>     at java.lang.ClassLoader.loadClass(
>     at sun.misc.Launcher$AppClassLoader.loadClass(
>     at java.lang.ClassLoader.loadClass(
>     at java.lang.Class.forName0(Native Method)
>     at java.lang.Class.forName(
>     at org.apache.hadoop.hive.ql.plan.TableDesc.getDeserializerClass(
>     ... 20 more

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