Enrique Saurez created CALCITE-3506:
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Summary: Avatica: exception in the writetoProtoWithType function
Key: CALCITE-3506
URL: https://issues.apache.org/jira/browse/CALCITE-3506
Project: Calcite
Issue Type: Bug
Components: avatica
Affects Versions: avatica-1.12.0
Reporter: Enrique Saurez
am using Apache Calcite-Avatica version 1.12 (but the relevant code
sections are not different from the master branch), and I am getting
the following exception on the client side (but the actual error in on
the server side):
||Exception||Heading 2||
|org.apache.calcite.avatica.AvaticaSqlException: Error -1 (00000) :
Remote driver error: ClassCastException: java.lang.Long cannot be cast
to java.lang.Float
at org.apache.calcite.avatica.Helper.createException(Helper.java:54)
at org.apache.calcite.avatica.Helper.createException(Helper.java:41)
at
org.apache.calcite.avatica.AvaticaConnection.executeQueryInternal(AvaticaConnection.java:557)
at
org.apache.calcite.avatica.AvaticaPreparedStatement.executeQuery(AvaticaPreparedStatement.java:137)
at
com.oltpbenchmark.benchmarks.tpcc.procedures.Payment.getCustomerByName(Payment.java:400)
at
com.oltpbenchmark.benchmarks.tpcc.procedures.Payment.run(Payment.java:221)
at
com.oltpbenchmark.benchmarks.tpcc.TPCCWorker.executeWork(TPCCWorker.java:74)
at com.oltpbenchmark.api.Worker.doWork(Worker.java:386)
at com.oltpbenchmark.api.Worker.run(Worker.java:296)
at java.lang.Thread.run(Thread.java:748)
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Float
at
org.apache.calcite.avatica.remote.TypedValue.writeToProtoWithType(TypedValue.java:594)
at
org.apache.calcite.avatica.remote.TypedValue.toProto(TypedValue.java:799)
at org.apache.calcite.avatica.Meta$Frame.serializeScalar(Meta.java:985)
at org.apache.calcite.avatica.Meta$Frame.parseColumn(Meta.java:971)
at org.apache.calcite.avatica.Meta$Frame.toProto(Meta.java:936)
at
org.apache.calcite.avatica.remote.Service$ResultSetResponse.serialize(Service.java:841)
at
org.apache.calcite.avatica.remote.Service$ExecuteResponse.serialize(Service.java:1158)
at
org.apache.calcite.avatica.remote.Service$ExecuteResponse.serialize(Service.java:1113)
at
org.apache.calcite.avatica.remote.ProtobufTranslationImpl.serializeResponse(ProtobufTranslationImpl.java:348)
at
org.apache.calcite.avatica.remote.ProtobufHandler.encode(ProtobufHandler.java:57)
at
org.apache.calcite.avatica.remote.ProtobufHandler.encode(ProtobufHandler.java:31)
at
org.apache.calcite.avatica.remote.AbstractHandler.apply(AbstractHandler.java:95)
at
org.apache.calcite.avatica.remote.ProtobufHandler.apply(ProtobufHandler.java:46)
at
org.apache.calcite.avatica.server.AvaticaProtobufHandler.handle(AvaticaProtobufHandler.java:127)
at
org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:499)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at
[org.eclipse.jetty.io|http://org.eclipse.jetty.io/].AbstractConnection$2.run(AbstractConnection.java:544)
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:748)|Col A2|
From the code, it seems like when the function "writeToProtoWithType"
is called from "toProto", there is a boxing conversion from long
(primitive) to Long (object), this is because
for floats, "toProto" is using "((Float) o).longValue()" which returns
a long. Then in "writeToProtoWithType" is being casted to float, which
I think causes the CastClassException.
If I add this code to the testFloat() function in the
"core/src/test/java/org/apache/calcite/avatica/remote/TypedValueTest.java"
file:
{code:java}
Common.TypedValue.Builder builder = Common.TypedValue.newBuilder();
Common.Rep val = TypedValue.toProto(builder, Float.valueOf(3.14159f));
Common.TypedValue typedVal = builder.build();{code}
it replicates the exception. I am not sure why are you using the longValue() on
the float within the toProto function? Doesn't this cast lose information?
Please let me know if you need any more information. I send an email to the dev
mailing list, but somebody suggested to create the issue here.
Thanks a lot for help!
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