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Jackson 2.7.1 doesn't work with jdk6 due to use of Collections.emptyIterator() #1134

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saladinkzn opened this issue Feb 18, 2016 · 3 comments
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Jackson 2.7.1 doesn't work with jdk6 due to use of Collections.emptyIterator() #1134

saladinkzn opened this issue Feb 18, 2016 · 3 comments
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2.7.2

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@saladinkzn
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Collections.emptyIterator() is not available on jdk6:

java.lang.IllegalAccessError: tried to access method java.util.Collections.emptyIterator()Ljava/util/Iterator; from class com.fasterxml.jackson.databind.util.ClassUtil
        at com.fasterxml.jackson.databind.util.ClassUtil.emptyIterator(ClassUtil.java:24)
        at com.fasterxml.jackson.databind.introspect.POJOPropertyBuilder.getConstructorParameters(POJOPropertyBuilder.java:383)
        at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._findCreatorsFromProperties(BasicDeserializerFactory.java:331)
        at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._constructDefaultValueInstantiator(BasicDeserializerFactory.java:312)
        at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory.findValueInstantiator(BasicDeserializerFactory.java:252)
        at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:221)
        at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:143)
        at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:406)
        at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:352)
        at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
        at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
        at com.fasterxml.jackson.databind.deser.DeserializerCache.hasValueDeserializerFor(DeserializerCache.java:191)
        at com.fasterxml.jackson.databind.DeserializationContext.hasValueDeserializerFor(DeserializationContext.java:422)
        at com.fasterxml.jackson.databind.ObjectMapper.canDeserialize(ObjectMapper.java:2633)
        at ru.shadam.ferry.simple.responsehandler.ObjectMapperResponseHandlerFactory.canCreateExtractor(ObjectMapperResponseHandlerFactory.java:25)
        at ru.shadam.ferry.factory.result.CompositeResultExtractorFactory.getResultExtractor(CompositeResultExtractorFactory.java:33)
        at ru.shadam.ferry.factory.InvocationHandlerFactory.getMethodExecutionContext(InvocationHandlerFactory.java:84)
        at ru.shadam.ferry.factory.InvocationHandlerFactory.createInvocationHandler(InvocationHandlerFactory.java:76)
        at ru.shadam.ferry.factory.ClientImplementationFactory.getInterfaceImplementation(ClientImplementationFactory.java:39)
@saladinkzn
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Well, maybe it's not actually an issue as you stated that 2.7.x has jdk7 base line

But this quote:

So it should still be possible to use Jackson 2.7 on Java 6, but not compile, build.

Is not true.

@cowtowncoder
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@saladinkzn Thank you for reporting this. Usage is accidental and is indeed contradicting the statement. Simple compatibility testing I tried managed to not notice this problem unfortunately. Will try to fix this for 2.7.2.

@cowtowncoder cowtowncoder added this to the 2.7.2 milestone Feb 22, 2016
@cowtowncoder cowtowncoder changed the title Jackson 2.7 doesn't work with jdk6 Jackson 2.7.1 doesn't work with jdk6 due to use of Collections.emptyIterator() Feb 22, 2016
@cowtowncoder
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Thank you for reporting this; issue fixed in 2.7.2. Please let me know if you uncover other similar issues.
I hope to figure out a better way to test for compatibility wrt JDK6.

@cowtowncoder cowtowncoder mentioned this issue Feb 25, 2016
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@johnjohndoe johnjohndoe mentioned this issue Feb 29, 2016
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@thachhoang thachhoang mentioned this issue Nov 7, 2016
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joelittlejohn added a commit to joelittlejohn/jsonschema2pojo that referenced this issue Nov 7, 2016
@joelittlejohn
Upgrade Jackson to support JDK6 users
c5cd6af 
See
FasterXML/jackson-databind#1134

Fix courtesy of @thachhoang

Closes #644
@cowtowncoder cowtowncoder mentioned this issue Oct 23, 2017
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@cowtowncoder @saladinkzn