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From "Damien B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAMEL-10504) Hiding an underlying exception if MongoDbBasicConverters fails to convert to DBObject
Date Wed, 17 May 2017 14:39:04 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-10504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16014127#comment-16014127
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Damien B commented on CAMEL-10504:
----------------------------------

Working on it. We can see the same behavior in the current tests:
{code}
2017-05-17 16:31:21,310 [main           ] WARN  MongoDbBasicConverters         - Conversion
has fallen back to generic Object -> DBObject, but unable to convert type java.util.ArrayList.
Returning null. java.lang.IllegalArgumentException: Can not deserialize instance of java.util.LinkedHashMap
out of START_ARRAY token
 at [Source: N/A; line: -1, column: -1]
2017-05-17 16:34:13,380 [main           ] WARN  MongoDbBasicConverters         - Conversion
has fallen back to generic Object -> DBObject, but unable to convert type org.apache.camel.impl.DefaultMessage.
Returning null. java.lang.IllegalArgumentException: (was java.lang.NullPointerException) (through
reference chain: org.apache.camel.impl.DefaultMessage["exchange"]->org.apache.camel.impl.DefaultExchange["context"]->org.apache.camel.spring.SpringCamelContext["managementNameStrategy"]->org.apache.camel.impl.DefaultManagementNameStrategy["name"])
{code}

Is there a way with the current structure of testing to check if those logs happen (I don't
really want to parse camel-mongodb-test.log)?


> Hiding an underlying exception if MongoDbBasicConverters fails to convert to DBObject
> -------------------------------------------------------------------------------------
>
>                 Key: CAMEL-10504
>                 URL: https://issues.apache.org/jira/browse/CAMEL-10504
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-mongodb
>    Affects Versions: 2.17.3, 2.18.0
>            Reporter: Evgenii Lomonosov
>            Assignee: Andrea Cosentino
>            Priority: Minor
>             Fix For: 2.18.1, 2.19.0
>
>
> If conversion fails it could be hard to understand what is a problem because it returns
just a message "Conversion has fallen back to generic Object -> DBObject, but unable to
convert type {}. Returning null" that points to a class that was not converted.
> In case of, as example, if a list of objects that should be converted leads to a memory
error because of parent-child link are cycled for 2 objects, it would take a lot of efforts
to understand what is going on. And information about underlying exception, stackoverflow
in this case, could help to find the root cause much faster than now.



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