elasticsearch - MVEL VerifyError with Bulk Update - Not updated few records in JAVA API -

i using elastic search bulk update java api. below script, using bulk update. in mapping nested object 'name' specified string field.

string updatescript = "if(ctx._source.containskey(\"nestedobjects\") && ctx._source.nestedobjects.size()>0) {     int nestedsize = ctx._source.nestedobjects.size();     boolean isupdated = false;     (int = 0; < nestedsize; i++)     {         if(ctx._source.nestedobjects[i].containskey(\"name\"))         {             if(ctx._source.nestedobjects[i].name == \"ram\")             {                 ctx._source.nestedobjects[i].name = \"ricky\";                 isupdated = true;             }         }     }     if(!isupdated)     {         ctx._source.nestedobjects.add(\"name\":\"ricky\");     } }"; 

below code using bulk update.

    bulkrequestbuilder bulkrequestbuilder = client.preparebulk();       (int i=0; i<5; i++)     {             string documentid = string.value(i);             bulkrequestbuilder.add(indexname, type, documentid).setscript(updatescript).setrouting(routingname).request());     }      bulkresponse bulkresponse = bulkrequestbuilder.execute().actionget(); 

bulk failure message:

message [verifyerror[(class: asmaccessorimpl_2153668671377692494610, method: getvalue signature: (ljava/lang/object;ljava/lang/object;lorg/elasticsearch/common/mvel2/integration/variableresolverfactory;)ljava/lang/object;) expecting find integer on stack]] 

note : few records not getting updated. if update again, other few records getting same error , not updated. record, got error first time got updated in second time.