android - Alarm manager not pushing data in server periodically for nougat -

i using alarmmanager call pendingintent. triggers wakefulbroadcastreceiver push data in server periodically. nougat, not pushing in periodic time. , draining battery much.

my code here->  public static void startsyncalarm(string enteredtime) {     // construct intent execute alarmreceiver     intent intent = new intent(context, syncdbtoserveralarmreceiver.class);     intent.putextra(constants.entered_time, enteredtime);     // create pendingintent triggered when alarm goes off     final pendingintent pintent = pendingintent.getbroadcast(context, syncdbtoserveralarmreceiver.request_code,             intent, pendingintent.flag_update_current);      // alarm needs set after 5 minutes of entered time     // convert entered time milliseconds     // create date object using string time format using simple date format     simpledateformat format = new simpledateformat("mm/dd/yyyy hh:mm:ss aa");     try {         date entereddate = format.parse(enteredtime);         long enteredtimeinmillis = entereddate.gettime();         long intervalmillis = 30 * 60 * 1000; // 30 minutes gap         long triggeratmillis = enteredtimeinmillis + intervalmillis;         log.d(tag, "start alarm, enteredtimemillis = " + enteredtimeinmillis + "\ntriggeratmillis = " + triggeratmillis);     //long firstmillis = system.currenttimemillis(); // alarm set right away         syncdbalarmmanager = (alarmmanager) context.getsystemservice(context.alarm_service);         // setup periodic alarm every 5 minutes         syncdbalarmmanager.setrepeating(alarmmanager.rtc_wakeup, triggeratmillis/*firstmillis*/,                 intervalmillis, pintent);     } catch (parseexception e) {         e.printstacktrace();     } }