android - Retrofit + rxandroid causes stackoverflow error on kitkat -

i working retrofit 2 + rxandroid, code works pefect on marshmallow , lollipop devices, fails kitkat devices.

@onclick(r.id.login_btn) public void onloginclicked() {     loginbtn.setenabled(false);     authenticationapi authapi = servicecreator.createservice(authenticationapi.class, null);     authapi.login(new loginuserrequest(emailedittext.gettext().tostring(), passwordedittext.gettext().tostring()))       .observeon(androidschedulers.mainthread())       .subscribe(verifyemailresponse -> log.i("test", "onnext: " + verifyemailresponse.success),              throwable -> {              handleerror(throwable);              loginbtn.setenabled(true);              }); } 

servicecreator.java

public class servicecreator {      private static okhttpclient.builder httpclient = new okhttpclient.builder();     private static final int default_timeout = 30; //seconds      private static gson gson = new gsonbuilder().setdateformat("yyyy-mm-dd't'hh:mm:ss").create();     private static rxjavacalladapterfactory rxadapter = rxjavacalladapterfactory.createwithscheduler(schedulers.io());      private static retrofit.builder builder = new retrofit.builder()             .baseurl(buildconfig.rest_base_endpoint)             .addconverterfactory(gsonconverterfactory.create(gson))             .addcalladapterfactory(rxadapter);      public static <restservice> restservice createservice(class<restservice> service, string usertoken) {          if (buildconfig.rest_debug) {             httplogginginterceptor logging = new httplogginginterceptor();             logging.setlevel(httplogginginterceptor.level.body);             httpclient.addinterceptor(logging);         }          if (stringutils.isnotblank(usertoken)) {             httpclient.addinterceptor(chain -> {                 request original = chain.request();                  request request = original.newbuilder()                         .header(constants.authorization_header, usertoken)                         .method(original.method(), original.body())                         .build();                 return chain.proceed(request);             });         }          httpclient.connecttimeout(default_timeout, timeunit.seconds);         httpclient.readtimeout(default_timeout, timeunit.seconds);         httpclient.writetimeout(default_timeout, timeunit.seconds);          retrofit retrofit = builder.client(httpclient.build()).build();         return retrofit.create(service);     }      public static retrofit retrofit() {         return builder.client(httpclient.build()).build();     } } 

the error:

fatal exception: rxnewthreadscheduler-1 java.lang.illegalstateexception: fatal exception thrown on scheduler.worker thread.    @ rx.internal.schedulers.scheduledaction.run(scheduledaction.java:59)    @ java.util.concurrent.executors$runnableadapter.call(executors.java:422)    @ java.util.concurrent.futuretask.run(futuretask.java:237)    @ java.util.concurrent.scheduledthreadpoolexecutor$scheduledfuturetask.access$201(scheduledthreadpoolexecutor.java:152)    @ java.util.concurrent.scheduledthreadpoolexecutor$scheduledfuturetask.run(scheduledthreadpoolexecutor.java:265)    @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)    @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)    @ java.lang.thread.run(thread.java:841) caused by: java.lang.stackoverflowerror    @ org.apache.harmony.security.asn1.asn1stringtype.getdecodedobject(asn1stringtype.java:99)    @ org.apache.harmony.security.asn1.asn1stringtype.decode(asn1stringtype.java:90)    @ org.apache.harmony.security.asn1.asn1choice.decode(asn1choice.java:308)    @ org.apache.harmony.security.x501.attributetypeandvalue$1.decode(attributetypeandvalue.java:339)    @ org.apache.harmony.security.asn1.berinputstream.readsequence(berinputstream.java:554)    @ org.apache.harmony.security.asn1.derinputstream.readsequence(derinputstream.java:105)    @ org.apache.harmony.security.asn1.asn1sequence.decode(asn1sequence.java:40)    @ org.apache.harmony.security.asn1.berinputstream.decodevaluecollection(berinputstream.java:626)    @ org.apache.harmony.security.asn1.berinputstream.readsetof(berinputstream.java:606)    @ org.apache.harmony.security.asn1.derinputstream.readsetof(derinputstream.java:115)    @ org.apache.harmony.security.asn1.asn1setof.decode(asn1setof.java:40)    @ org.apache.harmony.security.asn1.berinputstream.decodevaluecollection(berinputstream.java:626)    @ org.apache.harmony.security.asn1.berinputstream.readsequenceof(berinputstream.java:584)    @ org.apache.harmony.security.asn1.asn1sequenceof.decode(asn1sequenceof.java:40)    @ org.apache.harmony.security.asn1.asn1type.decode(asn1type.java:82)    @ javax.security.auth.x500.x500principal.<init>(x500principal.java:78)    @ com.android.org.conscrypt.opensslx509certificate.getissuerx500principal(opensslx509certificate.java:422)    @ com.android.org.conscrypt.opensslx509certificate.getissuerdn(opensslx509certificate.java:236)    @ com.android.org.conscrypt.trustmanagerimpl.cleanupcertchainandfindtrustanchors(trustmanagerimpl.java:340)    @ com.android.org.conscrypt.trustmanagerimpl.checktrusted(trustmanagerimpl.java:225)    @ com.android.org.conscrypt.trustmanagerimpl.checkservertrusted(trustmanagerimpl.java:202)    @ com.android.org.conscrypt.opensslsocketimpl.verifycertificatechain(opensslsocketimpl.java:611)    @ com.android.org.conscrypt.nativecrypto.ssl_do_handshake(native method)    @ com.android.org.conscrypt.opensslsocketimpl.starthandshake(opensslsocketimpl.java:405)    @ okhttp3.internal.connection.realconnection.connecttls(realconnection.java:241)    @ okhttp3.internal.connection.realconnection.establishprotocol(realconnection.java:198)    @ okhttp3.internal.connection.realconnection.buildconnection(realconnection.java:174)    @ okhttp3.internal.connection.realconnection.connect(realconnection.java:114)    @ okhttp3.internal.connection.streamallocation.findconnection(streamallocation.java:193)    @ okhttp3.internal.connection.streamallocation.findhealthyconnection(streamallocation.java:129)    @ okhttp3.internal.connection.streamallocation.newstream(streamallocation.java:98)    @ okhttp3.internal.connection.connectinterceptor.intercept(connectinterceptor.java:42)    @ okhttp3.internal.http.realinterceptorchain.proceed(realinterceptorchain.java:92)    @ okhttp3.internal.http.realinterceptorchain.proceed(realinterceptorchain.java:67)    @ okhttp3.internal.cache.cacheinterceptor.intercept(cacheinterceptor.java:109)    @ okhttp3.internal.http.realinterceptorchain.proceed(realinterceptorchain.java:92) 

thanks!

//update: have discovered cause error not solution, have created issue in https://github.com/square/okhttp/issues/2962

the error happens because adding same interceptor on , over, new version be.

public class servicecreator {      private okhttpclient.builder httpclient;     private static final int default_timeout = 30; //seconds      private gson gson;     private rxjavacalladapterfactory rxadapter;     private retrofit.builder builder;      private static servicecreator minstance = null;      private servicecreator() {         httpclient = new okhttpclient.builder();         gson = new gsonbuilder().setdateformat("yyyy-mm-dd't'hh:mm:ss").create();         rxadapter = rxjavacalladapterfactory.createwithscheduler(schedulers.io());         builder = new retrofit.builder()                 .baseurl(buildconfig.rest_base_endpoint)                 .addconverterfactory(gsonconverterfactory.create(gson))                 .addcalladapterfactory(rxadapter);          if (buildconfig.rest_debug) {             httplogginginterceptor logging = new httplogginginterceptor();             logging.setlevel(httplogginginterceptor.level.body);             httpclient.addinterceptor(logging);         }     }      public static servicecreator getinstance() {         if (minstance == null) {             minstance = new servicecreator();         }         return minstance;     }      public <restservice> restservice createservice(class<restservice> service, string usertoken) {          if (stringutils.isnotblank(usertoken)) {             httpclient.addinterceptor(chain -> {                 request original = chain.request();                  request request = original.newbuilder()                         .header(constants.authorization_header, usertoken)                         .method(original.method(), original.body())                         .build();                 return chain.proceed(request);             });         }          httpclient.connecttimeout(default_timeout, timeunit.seconds);         httpclient.readtimeout(default_timeout, timeunit.seconds);         httpclient.writetimeout(default_timeout, timeunit.seconds);          retrofit retrofit = builder.client(httpclient.build()).build();         return retrofit.create(service);     }      public retrofit retrofit() {         return getinstance().builder.client(getinstance().httpclient.build()).build();     } }