Re: NPE with 2.8.0 rc2, SDM, Errai

Yes, that's true. Some dependency hell is going on there.

Commenting out the errai profile does not help but it helps if you just add gson 2.6.2 to your project as a dependency

    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.6.2</version>
    </dependency>
</dependencies>

On Friday, August 19, 2016 at 4:13:12 PM UTC+3, Seamus McMorrow wrote:

I had a quick look at that sample project. 

The errai profile which is activated by default at the bottom of your pom.xml has a dependencyManagement section BOM import. 

That is conflicting the versions for gson and some others, xerces.

If you comment out the whole profile bit 

On Friday, 19 August 2016 13:42:27 UTC+1, Andrei Korzhevskii wrote:

Ok, I've tracked down the problem.

The problem is that gwt-dev somehow relies on gson 1.7.2 but should rely on 2.6.2. I dont know what the problem is. I hope Jens or Thomas can help with that.

The problem was that gson 1.7.2 incorrectly parsed provided source map string and returned empty JsonObject which resulted in NPE.

[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ sourcemap ---
[INFO] com.testcase:sourcemap:war:1.0-SNAPSHOT
[INFO] +- com.google.gwt:gwt-user:jar:2.8.0-rc2:provided
[INFO] |  +- com.google.jsinterop:jsinterop-annotations:jar:1.0.0:provided
[INFO] |  +- com.google.jsinterop:jsinterop-annotations:jar:sources:1.0.0:provided
[INFO] |  +- javax.validation:validation-api:jar:1.0.0.GA:provided
[INFO] |  +- javax.validation:validation-api:jar:sources:1.0.0.GA:provided
[INFO] |  +- javax.servlet:javax.servlet-api:jar:3.1.0:provided
[INFO] |  \- org.w3c.css:sac:jar:1.3:provided
[INFO] \- com.google.gwt:gwt-dev:jar:2.8.0-rc2:provided
[INFO]    +- com.google.code.gson:gson:jar:1.7.2:provided (version managed from 2.6.2)
[INFO]    +- org.ow2.asm:asm:jar:5.0.3:provided
[INFO]    +- org.ow2.asm:asm-util:jar:5.0.3:provided
[INFO]    |  \- org.ow2.asm:asm-tree:jar:5.0.3:provided
[INFO]    |     \- (org.ow2.asm:asm:jar:5.0.3:provided - omitted for duplicate)
[INFO]    +- org.ow2.asm:asm-commons:jar:5.0.3:provided
[INFO]    |  \- (org.ow2.asm:asm-tree:jar:5.0.3:provided - omitted for duplicate)
[INFO]    +- colt:colt:jar:1.2.0:provided
[INFO]    +- ant:ant:jar:1.6.5:provided
[INFO]    +- commons-collections:commons-collections:jar:3.2.2:provided
[INFO]    +- commons-io:commons-io:jar:2.4:provided
[INFO]    +- com.ibm.icu:icu4j:jar:50.1.1:provided
[INFO]    +- tapestry:tapestry:jar:4.0.2:provided
[INFO]    +- net.sourceforge.htmlunit:htmlunit:jar:2.19:provided
[INFO]    |  +- xalan:xalan:jar:2.7.1:provided (version managed from 2.7.2)
[INFO]    |  |  \- xalan:serializer:jar:2.7.1:provided
[INFO]    |  |     \- xml-apis:xml-apis:jar:1.4.01:provided (version managed from 1.3.04)
[INFO]    |  +- (commons-collections:commons-collections:jar:3.2.2:provided - version managed from 3.2.1; omitted for duplicate)
[INFO]    |  +- org.apache.commons:commons-lang3:jar:3.1:provided (version managed from 3.4)
[INFO]    |  +- org.apache.httpcomponents:httpclient:jar:4.5:provided (version managed from 4.5.1)
[INFO]    |  |  +- org.apache.httpcomponents:httpcore:jar:4.4.1:provided
[INFO]    |  |  \- (commons-codec:commons-codec:jar:1.10:provided - version managed from 1.9; omitted for duplicate)
[INFO]    |  +- org.apache.httpcomponents:httpmime:jar:4.5.1:provided
[INFO]    |  |  \- (org.apache.httpcomponents:httpclient:jar:4.5:provided - version managed from 4.5.1; omitted for duplicate)
[INFO]    |  +- commons-codec:commons-codec:jar:1.10:provided
[INFO]    |  +- net.sourceforge.htmlunit:htmlunit-core-js:jar:2.17:provided
[INFO]    |  +- xerces:xercesImpl:jar:2.11.0.SP4:provided (version managed from 2.11.0)
[INFO]    |  +- net.sourceforge.nekohtml:nekohtml:jar:1.9.22:provided
[INFO]    |  +- net.sourceforge.cssparser:cssparser:jar:0.9.18:provided
[INFO]    |  |  \- (org.w3c.css:sac:jar:1.3:provided - omitted for duplicate)
[INFO]    |  +- (commons-io:commons-io:jar:2.4:provided - omitted for duplicate)
[INFO]    |  +- commons-logging:commons-logging:jar:1.1.1:provided (version managed from 1.2)
[INFO]    |  \- org.eclipse.jetty.websocket:websocket-client:jar:9.2.13.v20150730:provided
[INFO]    |     +- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    |     +- (org.eclipse.jetty:jetty-io:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    |     \- org.eclipse.jetty.websocket:websocket-common:jar:9.2.13.v20150730:provided
[INFO]    |        +- org.eclipse.jetty.websocket:websocket-api:jar:9.2.13.v20150730:provided
[INFO]    |        +- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    |        \- (org.eclipse.jetty:jetty-io:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    +- org.eclipse.jetty:jetty-webapp:jar:9.2.14.v20151106:provided
[INFO]    |  +- org.eclipse.jetty:jetty-xml:jar:9.2.14.v20151106:provided
[INFO]    |  |  \- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    |  \- org.eclipse.jetty:jetty-servlet:jar:9.2.14.v20151106:provided
[INFO]    |     \- org.eclipse.jetty:jetty-security:jar:9.2.14.v20151106:provided
[INFO]    |        \- (org.eclipse.jetty:jetty-server:jar:9.2.14.v20151106:provided - omitted for duplicate)
[INFO]    +- org.eclipse.jetty:jetty-servlets:jar:9.2.14.v20151106:provided
[INFO]    |  +- org.eclipse.jetty:jetty-continuation:jar:9.2.14.v20151106:provided
[INFO]    |  +- org.eclipse.jetty:jetty-http:jar:9.2.14.v20151106:provided
[INFO]    |  |  \- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    |  +- org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided
[INFO]    |  \- org.eclipse.jetty:jetty-io:jar:9.2.14.v20151106:provided
[INFO]    |     \- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    +- org.eclipse.jetty:jetty-annotations:jar:9.2.14.v20151106:provided
[INFO]    |  +- org.eclipse.jetty:jetty-plus:jar:9.2.14.v20151106:provided
[INFO]    |  |  +- (org.eclipse.jetty:jetty-webapp:jar:9.2.14.v20151106:provided - omitted for duplicate)
[INFO]    |  |  \- org.eclipse.jetty:jetty-jndi:jar:9.2.14.v20151106:provided
[INFO]    |  |     \- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]    |  +- (org.eclipse.jetty:jetty-webapp:jar:9.2.14.v20151106:provided - omitted for duplicate)
[INFO]    |  +- javax.annotation:javax.annotation-api:jar:1.2:provided
[INFO]    |  +- (org.ow2.asm:asm:jar:5.0.3:provided - version managed from 5.0.1; omitted for duplicate)
[INFO]    |  \- (org.ow2.asm:asm-commons:jar:5.0.1:provided - omitted for conflict with 5.0.3)
[INFO]    \- org.eclipse.jetty:apache-jsp:jar:9.2.14.v20151106:provided
[INFO]       +- (org.eclipse.jetty:jetty-util:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]       +- org.eclipse.jetty:jetty-server:jar:9.2.14.v20151106:provided
[INFO]       |  +- (javax.servlet:javax.servlet-api:jar:3.1.0:provided - omitted for duplicate)
[INFO]       |  +- (org.eclipse.jetty:jetty-http:jar:9.2.14.v20151106:provided - omitted for duplicate)
[INFO]       |  \- (org.eclipse.jetty:jetty-io:jar:9.2.14.v20151106:provided - version managed from 9.2.13.v20150730; omitted for duplicate)
[INFO]       +- org.eclipse.jetty.toolchain:jetty-schemas:jar:3.1.M0:provided
[INFO]       +- (javax.servlet:javax.servlet-api:jar:3.1.0:provided - omitted for duplicate)
[INFO]       \- org.mortbay.jasper:apache-jsp:jar:8.0.9.M3:provided
[INFO]          +- (org.eclipse.jetty.toolchain:jetty-schemas:jar:3.1.M0:provided - omitted for duplicate)
[INFO]          \- org.mortbay.jasper:apache-el:jar:8.0.9.M3:provided

On Friday, August 19, 2016 at 2:33:55 PM UTC+3, Alberto Mancini wrote:

mvn:run should give you the error 

Sorry, i mean:  

mvn gwt:run 

 

Thanks,  

   A. 

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