[CALCITE-586] Serializing Signature.internalParameters can cause exceptions

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.1.0-incubating
• Assignee: Julian Hyde
• Reporter: Trevor Hartman
• Created: 04/Feb/15 16:50
• Updated: 23/Mar/15 08:08
• Resolved: 09/Feb/15 02:26

Description

Observed exceptions:

java.lang.AssertionError: null
at org.apache.calcite.rel.type.RelDataTypeImpl.getFieldList(RelDataTypeImpl.java:138) ~[calcite-core-1.0.0-incubating-SNAPSHOT.jar:1.0.0-incubating-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25]
at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:466) ~[jackson-databind-2.4.2.jar:2.4.2]

And in https://github.com/devth/calcite-map-demo:

java.lang.RuntimeException: com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class org.apache.calcite.sql.type.SqlTypeExplicitPrecedenceList and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationConfig.SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: org.apache.calcite.avatica.remote.ResultSetResponse["signature"]->org.apache.calcite.avatica.Signature["internalParameters"]->java.util.LinkedHashMap["v0stashed"]->com.google.common.collect.RegularImmutableList[0]->org.apache.calcite.rex.RexCall["operands"]->com.google.common.collect.RegularImmutableList[0]->org.apache.calcite.rex.RexInputRef["type"]->org.apache.calcite.sql.type.MapSqlType["keyType"]->org.apache.calcite.sql.type.BasicSqlType["precedenceList"])
        at org.apache.calcite.avatica.remote.JsonHandler.handle(JsonHandler.java:61) ~[calcite-avatica-1.0.0-incubating.jar:1.0.0-incubating]
        at org.apache.calcite.avatica.remote.JsonHandler.apply(JsonHandler.java:46) ~[calcite-avatica-1.0.0-incubating.jar:1.0.0-incubating]
        at org.apache.calcite.avatica.server.AvaticaHandler.handle(AvaticaHandler.java:47) ~[calcite-avatica-server-1.0.0-incubating.jar:1.0.0-incubating]

Pull request:
https://github.com/apache/incubator-calcite/pull/48