java.lang.NoSuchMethodError caused by dependency conflict issue due to multiple versions of com.fasterxml.jackson.core:jackson-core:jar #540
Description
Hi, there are multiple versions of com.fasterxml.jackson.core:jackson-core:jar in org.numenta:htm.java:jar:0.6.13. As shown in the following dependency tree, based on "Maven's nearest wins strategy", only com.fasterxml.jackson.core:jackson-core:jar:2.4.4 will be loaded and the other conflicting versions will be shadowed, during the packaging process.
However, method <com.fasterxml.jackson.core.JsonParser: java.lang.String nextFieldName()> only exists in jackson-core 2.5.3 and not included in the loaded jackson-core:jar:2.4.4. As a result, an exception will be thrown with the following stack trace, when your project invoking the missing method.
Stack trace
Exception in thread "main" java.lang.NoSuchMethodError: com.fasterxml.jackson.core.JsonParser.nextFieldName()Ljava/lang/String;
at org.nustaq.serialization.coders.FSTJsonDecoder.readObjectHeaderTag(FSTJsonDecoder.java:329)
at org.nustaq.serialization.FSTObjectInput.readObjectWithHeader(FSTObjectInput.java:340)
at org.nustaq.serialization.FSTObjectInput.readObjectInternal(FSTObjectInput.java:327)
at org.nustaq.serialization.FSTObjectInput.readObject(FSTObjectInput.java:298)
at org.numenta.nupic.Parameters.readForNetwork(Parameters.java:1174)
Dependency tree
org.numenta:htm.java:jar:0.6.13
+- joda-time:joda-time:jar:2.5:compile
+- com.fasterxml.jackson.core:jackson-annotations:jar:2.4.4:compile
+- com.fasterxml.jackson.core:jackson-core:jar:2.4.4:compile
+- com.fasterxml.jackson.core:jackson-databind:jar:2.4.4:compile
| +- (com.fasterxml.jackson.core:jackson-annotations:jar:2.4.0:compile - omitted for conflict with 2.4.4)
| - (com.fasterxml.jackson.core:jackson-core:jar:2.4.4:compile - omitted for duplicate)
+- de.ruedigermoeller:fst:jar:2.45:compile
| +- (com.fasterxml.jackson.core:jackson-core:jar:2.5.3:compile - omitted for conflict with 2.4.4)
| +- org.javassist:javassist:jar:3.19.0-GA:compile
| - org.objenesis:objenesis:jar:2.1:compile
- algorithmfoundry:algorithmfoundry-shade-culled:jar:1.3:compile
Solution
Upgrade jackson (include jackson-annotations, jackson-core and jackson-databind) to version 2.5.3 to keep consistent with de.ruedigermoeller:fst.
Thanks
Regards,
Leo