apache httpcomponents - Error while trying to use an API. java.lang.NoSuchFieldError: INSTANCE -


i trying connect smartsheet api using java program. had problems site certificate resolved adding java keystore. when trying run code, following error.

exception in thread "main" java.lang.nosuchfielderror: instance     @ org.apache.http.conn.ssl.sslconnectionsocketfactory.<clinit>(sslconnectionsocketfactory.java:144)     @ org.apache.http.impl.client.httpclientbuilder.build(httpclientbuilder.java:955)     @ org.apache.http.impl.client.httpclients.createdefault(httpclients.java:58)     @ com.smartsheet.api.internal.http.defaulthttpclient.<init>(defaulthttpclient.java:64)     @ com.smartsheet.api.smartsheetbuilder.build(smartsheetbuilder.java:203)     @ smartsheetconnection.main(smartsheetconnection.java:13)

this code (i followed documentation).

import com.smartsheet.api.*; import com.smartsheet.api.models.*; import com.smartsheet.api.models.enums.*; import com.smartsheet.api.oauth.*;  public class smartsheetconnection {     public static void main(string[] args) throws smartsheetexception {         // set access token.         token token = new token();         token.setaccesstoken("foo");         smartsheet smartsheet = new smartsheetbuilder().setaccesstoken(token.getaccesstoken()).build();     } }

the line throwing error (line 144)

@deprecated     public static final x509hostnameverifier allow_all_hostname_verifier         = allowallhostnameverifier.instance;

but not sure make of it. using maven dependencies. have version of apache httpcomponents?

here pom.xml

    <build>         <sourcedirectory>src</sourcedirectory>         <plugins>             <plugin>                 <artifactid>maven-compiler-plugin</artifactid>                 <version>3.1</version>                 <configuration>                     <source>1.8</source>                     <target>1.8</target>                 </configuration>             </plugin>             <plugin>                 <artifactid>maven-war-plugin</artifactid>                 <version>2.4</version>                 <configuration>                     <warsourcedirectory>webcontent</warsourcedirectory>                     <failonmissingwebxml>false</failonmissingwebxml>                 </configuration>             </plugin>         </plugins>     </build>     <dependencies>         <dependency>             <groupid>com.smartsheet</groupid>             <artifactid>smartsheet-sdk-java</artifactid>             <version>2.0.2</version>             <scope>provided</scope>         </dependency>         <dependency>             <groupid>com.sun.jersey.contribs</groupid>             <artifactid>jersey-apache-client</artifactid>             <version>1.9</version>         </dependency>     </dependencies>

other posts error seem suggest it's typically caused conflicting versions of httpcore jar. i.e., older version of httpcore on classpath.

for more information, i'd suggest checkout following posts:


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