com.fasterxml.jackson.databind.JsonMappingException - No idea what went wrong

[akshay....@agrostar.in]

So all the tests in my projects were fine, and all of a sudden I see below exception for a lot of tests.

I have absolutely no idea what's going on. Please help.

com.fasterxml.jackson.databind.JsonMappingException: JsonObject (through reference chain: com.google.gson.JsonObject["asString"])
 at com.google.gson.JsonElement.getAsString(JsonElement.java:191)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.get(BeanPropertyWriter.java:679)
 at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:534)
 at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:597)
 at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:142)
 at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:118)
 at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1819)
 at com.fasterxml.jackson.databind.ObjectMapper$writeValue$0.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
 at io.restassured.internal.mapping.Jackson2Mapper.serialize(Jackson2Mapper.groovy:53)
 at io.restassured.internal.mapping.Jackson2Mapper.serialize(Jackson2Mapper.groovy)
 at io.restassured.mapper.ObjectMapper$serialize.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
 at io.restassured.internal.mapping.ObjectMapping.serializeWithJackson2(ObjectMapping.groovy:181)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
 at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite$StaticMetaMethodSiteNoUnwrapNoCoerce.invoke(StaticMetaMethodSite.java:151)
 at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.callStatic(StaticMetaMethodSite.java:102)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallStatic(CallSiteArray.java:56)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:194)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:214)
 at io.restassured.internal.mapping.ObjectMapping.serialize(ObjectMapping.groovy:130)
 at io.restassured.internal.mapping.ObjectMapping$serialize.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
 at io.restassured.internal.RequestSpecificationImpl.body(RequestSpecificationImpl.groovy:829)
 at crm.farmer_onboarding.FarmerOnboardingTests.verifyVerifyOtp(FarmerOnboardingTests.java:70)

[akshay....@agrostar.in]

After some analysis in the failure pattern, I've observed that all the tests failed with this exception have wither POST, PUT or PATCH requests.

I'm posting the line of code from one of the tests, this code was working absolutely fine until now.

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import static io.restassured.RestAssured.given;
import io.restassured.response.Response;

RequestSpecification spec = new RequestSpecBuilder().setBaseUri(someBaseUri).setBasePath(someEndpoint).build();
JsonParser parser = new JsonParser();
JsonObject jsonObject = parser.parse("requestBody").getAsJsonObject();
response = given().spec(spec).headers("key","value").body(jsonObject).when().post(); //the exception is throw from this line

[Johan Haleby]

Try 

RestAssured.config = RestAssured.config().httpClient(httpClientConfig().reuseHttpClientInstance());

/Johan

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[akshay....@agrostar.in]

Hi Johan,

I tried to put that line in my TestNG Listener where I'm doing some global configuration, e.g. RestAssured.baseURI = "http://foo.bar.com/", but I'm getting below new exception due to the same.

java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection still allocated.
Make sure to release the connection before allocating another one.
 at org.apache.http.util.Asserts.check(Asserts.java:34)
 at org.apache.http.impl.conn.BasicClientConnectionManager.getConnection(BasicClientConnectionManager.java:166)
 at org.apache.http.impl.conn.BasicClientConnectionManager$1.getConnection(BasicClientConnectionManager.java:148)
 at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:424)
 at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:884)
 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
 at org.apache.http.client.HttpClient$execute$0.call(Unknown Source)
 at io.restassured.internal.RequestSpecificationImpl$RestAssuredHttpBuilder.doRequest(RequestSpecificationImpl.groovy:2122)
 at io.restassured.internal.http.HTTPBuilder.doRequest(HTTPBuilder.java:494)
 at io.restassured.internal.http.HTTPBuilder.request(HTTPBuilder.java:451)
 at io.restassured.internal.http.HTTPBuilder$request$2.call(Unknown Source)
 at io.restassured.internal.RequestSpecificationImpl.sendHttpRequest(RequestSpecificationImpl.groovy:1525)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

 at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1027)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:815)
 at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58)
 at io.restassured.internal.RequestSpecificationImpl.sendRequest(RequestSpecificationImpl.groovy:1288)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

 at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1027)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:815)
 at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:149)
 at io.restassured.internal.filter.SendRequestFilter.filter(SendRequestFilter.groovy:30)
 at io.restassured.filter.Filter$filter$0.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
 at io.restassured.filter.Filter$filter.call(Unknown Source)
 at io.restassured.internal.filter.FilterContextImpl.next(FilterContextImpl.groovy:72)
 at io.restassured.filter.time.TimingFilter.filter(TimingFilter.java:56)
 at io.restassured.filter.Filter$filter.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
 at io.restassured.filter.Filter$filter$0.call(Unknown Source)
 at io.restassured.internal.filter.FilterContextImpl.next(FilterContextImpl.groovy:72)
 at io.restassured.filter.FilterContext$next.call(Unknown Source)
 at io.restassured.internal.RequestSpecificationImpl.applyPathParamsAndSendRequest(RequestSpecificationImpl.groovy:1725)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

 at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1027)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:815)
 at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182)
 at io.restassured.internal.RequestSpecificationImpl.applyPathParamsAndSendRequest(RequestSpecificationImpl.groovy:1731)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

 at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1027)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:815)
 at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182)
 at io.restassured.internal.RequestSpecificationImpl.get(RequestSpecificationImpl.groovy:168)
 at io.restassured.internal.RequestSpecificationImpl.get(RequestSpecificationImpl.groovy)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

 at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1027)
 at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:815)
 at io.restassured.internal.RequestSpecificationImpl.invokeMethod(RequestSpecificationImpl.groovy)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.call(PogoInterceptableSite.java:48)
 at org.codehaus.groovy.runtime.callsite.PogoInterceptableSite.callCurrent(PogoInterceptableSite.java:58)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:166)
 at io.restassured.internal.RequestSpecificationImpl.get(RequestSpecificationImpl.groovy:252)
 at io.restassured.internal.RequestSpecificationImpl.get(RequestSpecificationImpl.groovy)
 at utils.Utils.runServiceCheckTests(Utils.java:39)
 at base.initial_tests.BaseTests.checkIfAllServicesAreUp(BaseTests.java:21)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)

 at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
 at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564)
 at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213)
 at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138)
 at org.testng.SuiteRunner.privateRun(SuiteRunner.java:277)
 at org.testng.SuiteRunner.run(SuiteRunner.java:240)
 at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
 at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
 at org.testng.TestNG.runSuitesSequentially(TestNG.java:1198)
 at org.testng.TestNG.runSuitesLocally(TestNG.java:1123)
 at org.testng.TestNG.run(TestNG.java:1031)
 at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
 at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
 at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

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[Johan Haleby]

Are you running the tests in parallel?

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[akshay....@agrostar.in]

No. All the tests run one-by-one. BTW, I'm on RA 3.0.3 version.

[Johan Haleby]

Strange, can't explain that. We're running thousands of RA tests in 3.0.3 and we don't get this error.

/Johan

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[akshay....@agrostar.in]

Okay, I think I found the culprit change from the commit history of my project. Removing below chunk from my pom.xml magically happens to resolve the issue. When I put the chunk back in pom.xml, I hit the original issue again.

This is really strange. Any thoughts on this?

      <dependency>
         <groupId>io.rest-assured</groupId>
         <artifactId>json-schema-validator</artifactId>
         <version>3.0.3</version>
      </dependency>
      <dependency>
         <groupId>com.github.fge</groupId>
         <artifactId>json-schema-validator</artifactId>
         <version>2.2.6</version>
      </dependency>
      <dependency>
         <groupId>com.github.fge</groupId>
         <artifactId>json-schema-core</artifactId>
         <version>1.2.5</version>
      </dependency>

Below is the complete content of my pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.agrostar.avs</groupId>
   <artifactId>avs</artifactId>
   <version>2.0</version>
   <dependencies>
      <dependency>
         <groupId>org.hamcrest</groupId>
         <artifactId>hamcrest-all</artifactId>
         <version>1.3</version>
      </dependency>
      <dependency>
         <groupId>com.google.code.gson</groupId>
         <artifactId>gson</artifactId>
         <version>2.6.2</version>
      </dependency>
      <dependency>
         <groupId>io.rest-assured</groupId>
         <artifactId>rest-assured</artifactId>
         <version>3.0.3</version>
      </dependency>
      <dependency>
         <groupId>org.codehaus.groovy</groupId>
         <artifactId>groovy-all</artifactId>
         <version>2.4.10</version>
      </dependency>
      <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>6.0.5</version>
      </dependency>
      <dependency>
         <groupId>com.github.wnameless</groupId>
         <artifactId>json-flattener</artifactId>
         <version>0.2.2</version>
      </dependency>
      <dependency>
         <groupId>org.json</groupId>
         <artifactId>json</artifactId>
         <version>20160810</version>
      </dependency>
      <dependency>
         <groupId>log4j</groupId>
         <artifactId>log4j</artifactId>
         <version>1.2.17</version>
      </dependency>
      <dependency>
         <groupId>com.jayway.jsonpath</groupId>
         <artifactId>json-path</artifactId>
         <version>2.2.0</version>
      </dependency>
      <dependency>
         <groupId>com.google.guava</groupId>
         <artifactId>guava</artifactId>
         <version>19.0</version>
      </dependency>
      <dependency>
         <groupId>io.rest-assured</groupId>
         <artifactId>json-schema-validator</artifactId>
         <version>3.0.3</version>
      </dependency>
      <dependency>
         <groupId>com.github.fge</groupId>
         <artifactId>json-schema-validator</artifactId>
         <version>2.2.6</version>
      </dependency>
      <dependency>
         <groupId>com.github.fge</groupId>
         <artifactId>json-schema-core</artifactId>
         <version>1.2.5</version>
      </dependency>
      <dependency>
         <groupId>org.testng</groupId>
         <artifactId>testng</artifactId>
         <version>6.8</version>
      </dependency>
   </dependencies>
   <build>
      <plugins>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.18.1</version>
            <configuration>
               <suiteXmlFiles>
                  <suiteXmlFile>testng-crm.xml</suiteXmlFile>
                  <suiteXmlFile>testng-catalogue.xml</suiteXmlFile>
               </suiteXmlFiles>
            </configuration>
         </plugin>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>3.0.2</version>
            <executions>
               <execution>
                  <goals>
                     <goal>jar</goal>
                     <goal>test-jar</goal>
                  </goals>
               </execution>
            </executions>
         </plugin>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <configuration>
               <source>1.8</source>
               <target>1.8</target>
            </configuration>
         </plugin>
      </plugins>
   </build>
</project>

[Johan Haleby]

Ok, so maybe you run into some versioning issues with some third-party dependency.

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[akshay....@agrostar.in]

Alright. I'll find out some solution for this scenario.

Thanks Johan!

[akshay....@agrostar.in]

Hi Johan,

I see that even if I only add below dependency alone in my pom.xml, I still encounter the issue. When I remove it, I do not face any issue.

      <dependency>
         <groupId>io.rest-assured</groupId>
         <artifactId>json-schema-validator</artifactId>
         <version>3.0.3</version>
      </dependency>

[Johan Haleby]

Right, so that indicates that there's some versioning conflicts.

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[akshay....@agrostar.in]

Do you mean versioning conflicts with some dependency from my pom.xml itself? I do not know how to determine which dependency would possibly be causing that.

[Johan Haleby]

Try using something like https://github.com/ning/maven-dependency-versions-check-plugin

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[akshay....@agrostar.in]

Thanks, I tried using that maven plugin, but no dependency conflicts were reported by it.

After installing the plugin, I checked for dependency conflicts using:

mvn com.ning.maven.plugins:maven-dependency-versions-check-plugin:check