Smartclient 13.0 RESTHandler error

[ccarneiro]

Hi, we have a stable Smartclient application and we wanted to experiment the new REST APIs with the existing datasource in the application using the 13.0 release of smartclient.

After upgrading Smartclient in the application to "isomorphic-13.0.7.19.21.zip", and mapping the RESTHandler servlet in web.xml like this:

<servlet>
<servlet-name>RESTHandler</servlet-name>
<servlet-class>com.isomorphic.servlet.RESTHandler</servlet-class>
<init-param>
<param-name>defaultDataFormat</param-name>
<param-value>json</param-value>
</init-param>
<init-param>
<param-name>wrapJSONResponses</param-name>
<param-value>false</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>RESTHandler</servlet-name>
<url-pattern>/restapi/*</url-pattern>
</servlet-mapping>

We get the following error when trying to access the openAPI documentation in the URL {DOMAIN}/restapi/openapi.yaml

13:21:27,083 ERROR [io.undertow.request] (default task-2) UT005023: Exception handling request to /dev/restapi/openapi.yaml: java.lang.NoSuchFieldError: VERSION_2_3_28
at deployment.dev.war//com.isomorphic.servlet.RESTHandler.init(RESTHandler.java:458)
at javax.servlet.api@2.0.0.Final//javax...icServlet.java:180)
at deployment.dev.war//com.isomorphic.servlet.BaseServlet.init(BaseServlet.java:137)
at io.undertow.servlet@2.1.3.Final//io....nvocation.java:117)
at org.wildfly.extension.undertow@20.0....terceptor.java:78)
at io.undertow.servlet@2.1.3.Final//io....nvocation.java:103)
at io.undertow.servlet@2.1.3.Final//io....edServlet.java:305)
at io.undertow.servlet@2.1.3.Final//io....edServlet.java:212)
at io.undertow.servlet@2.1.3.Final//io....vletChain.java:130)
at io.undertow.servlet@2.1.3.Final//io....vletChain.java:63)
at io.undertow.servlet@2.1.3.Final//io....ngHandler.java:36)
at org.wildfly.extension.undertow@20.0....onHandler.java:78)
at io.undertow.core@2.1.3.Final//io.und...teHandler.java:43)
at io.undertow.servlet@2.1.3.Final//io....irHandler.java:68)
at io.undertow.servlet@2.1.3.Final//io....onHandler.java:132)
at io.undertow.servlet@2.1.3.Final//io....llHandler.java:57)
at io.undertow.core@2.1.3.Final//io.und...teHandler.java:43)
at io.undertow.core@2.1.3.Final//io.und...tyHandler.java:46)
at io.undertow.servlet@2.1.3.Final//io....ntHandler.java:64)
at io.undertow.core@2.1.3.Final//io.und...msHandler.java:60)
at io.undertow.servlet@2.1.3.Final//io....onHandler.java:77)
at io.undertow.core@2.1.3.Final//io.und...erHandler.java:50)
at io.undertow.core@2.1.3.Final//io.und...onHandler.java:43)
at io.undertow.core@2.1.3.Final//io.und...teHandler.java:43)
at org.wildfly.extension.undertow@20.0....IdHandler.java:61)
at io.undertow.core@2.1.3.Final//io.und...teHandler.java:43)
at org.wildfly.extension.undertow@20.0....erHandler.java:68)
at io.undertow.core@2.1.3.Final//io.und...teHandler.java:43)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:269)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:78)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:133)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:130)
at io.undertow.servlet@2.1.3.Final//io....tupAction.java:48)
at io.undertow.servlet@2.1.3.Final//io....tupAction.java:43)
at org.wildfly.extension.undertow@20.0....tupAction.java:105)
at org.wildfly.extension.undertow@20.0....foService.java:1530)
at org.wildfly.extension.undertow@20.0....foService.java:1530)
at org.wildfly.extension.undertow@20.0....foService.java:1530)
at org.wildfly.extension.undertow@20.0....foService.java:1530)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:249)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:78)
at io.undertow.servlet@2.1.3.Final//io....alHandler.java:99)
at io.undertow.core@2.1.3.Final//io.und...onnectors.java:370)
at io.undertow.core@2.1.3.Final//io.und...rExchange.java:830)
at org.jboss.threads@2.3.3.Final//org.j...gRunnable.java:35)
at org.jboss.threads@2.3.3.Final//org.j...eExecutor.java:1982)
at org.jboss.threads@2.3.3.Final//org.j...eExecutor.java:1486)
at org.jboss.threads@2.3.3.Final//org.j...eExecutor.java:1377)
at java.base/java.lang.Thread.run(Thread.java:834)

Any thoughts?

[Isomorphic]

It looks like perhaps you've upgraded the SmartClient runtime but not its dependencies? RESTHandler requires a Freemarker version 2.3.28 or greater.

[ccarneiro]

The freemarker dependency was the first error we had while upgrading SmartClient indeed, we then added the dependency to our pom.xml like this:

<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.28</version>
</dependency>

It fixed the issue with the dependency but we started seeing the error I pasted in my original post "Exception handling request to /dev/restapi/openapi.yaml: java.lang.NoSuchFieldError: VERSION_2_3_28
at deployment.dev.war//com.isomorphic.servlet.RESTHandler.init(RESTHandler.java:458)"

[Isomorphic]

Said differently, that error indicates that you somehow have an older version of Freemarker on your classpath.