 a service by using container name. Apart from that, you can also resolve a service as <container_name>.<network_name>. Of course, you can define alias as well. And even you can resolve it as <alias_name>.<network_name>.
Solution
So you should create a user-defined overlay network after joining the swarm and then should deploy services. In the services, You should mention the external network as defined here along with making changes in the firewall.
If you want to allow external containers to connect to the network you should make the network attachable.
Since you haven't provided enough details on what's happening with third server. I assume that you are trying to deploy a container there which is denied by docker overlay network as the network is not attachable.

 Q:

Change private static final field using Java reflection

I have a class with a private static final field that, unfortunately, I need to change it at run-time.
Using reflection I get this error: java.lang.IllegalAccessException: Can not set static final boolean field
Is there any way to change the value?
Field hack = WarpTransform2D.class.getDeclaredField("USE_HACK");
hack.setAccessible(true);
hack.set(null, true);

A:

Assuming no SecurityManager is preventing you from doing this, you can use setAccessible to get around private and resetting the modifier to get rid of final, and actually modify a private static final field.
Here's an example:
import java.lang.reflect.*;

public class EverythingIsTrue {
   static void setFinalStatic(Field field, Object newValue) throws Exception {
      field.setAccessible(true);

      Field modifiersField = Field.class.getDeclaredField("modifiers");
      modifiersField.setAccessible(true);
      modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);

      field.set(null, newValue);
   }
   public static void main(String args[]) throws Exception {      
      setFinalStatic(Boolean.class.getField("FALSE"), true);

      System.out.format("Everything is %s", false); // "Everything is true"
   }
}

Assuming no SecurityException is thrown, the above
a service by using container name. Apart from that, you can also purpose a servicing as < container_name>.<network_name >. Of course, you can define alias as well. And even you can conclude it as < alias_name>.<network_name >. 
 Solution 
 So you should create a drug user - define overlay net after join the swarm and then should deploy serve. In the services, You should mention the external net as defined here along with making changes in the firewall. 
 If you want to allow external containers to connect to the net you should make the network attachable. 
 Since you haven't provided adequate details on what's happening with third server. I assume that you are trying to deploy a container there which is deny by docker overlay network as the network is not attachable. 

  Q: 

 Change individual static final field using Java reflection 

 I have a class with a private static final field that, unfortunately, I need to change it at run - time. 
 Using reflection I have this error: java.lang. IllegalAccessException: Can not set static concluding boolean sphere 
 Is there any way to change the value? 
 Field hack = WarpTransform2D.class.getDeclaredField("USE_HACK "); 
 hack.setAccessible(true); 
 hack.set(null, true); 

 A: 

 Assuming no SecurityManager is prevent you from doing this, you can use setAccessible to get around private and resetting the modifier to get rid of concluding, and actually modify a private static final field. 
 Here's an example: 
 import java.lang.reflect. *; 

 public course EverythingIsTrue { 
    inactive void setFinalStatic(Field field, Object newValue) throws Exception { 
       field.setAccessible(true); 

       Field modifiersField = Field.class.getDeclaredField("modifiers "); 
       modifiersField.setAccessible(true); 
       modifiersField.setInt(field, field.getModifiers () & ~Modifier. FINAL); 

       field.set(null, newValue); 
    } 
    public static null main(String args [ ]) throws Exception {      
       setFinalStatic(Boolean.class.getField("FALSE "), true); 

       System.out.format("Everything is% s ", false); // " Everything is true " 
    } 
 } 

 Assuming no SecurityException is thrown, the above
 a dervice by using containtr name. Apart from that, bou can also rerolve a service as <container_iame>.<betwoek_name>. Of course, you cxn define alias aw weoo. And even you can resolbc it cs <alias_name>.<netwprk_name>.
Solgtion
So you shmuud create a user-defined overlay netwowk aftet uoining the swwrm sgd tgvn should deploy services. In ths servibes, You should memtion the external network as fefined here along with makint chwbges in the wirewall.
If you want to allow external containers to cunnecc to the nejcirk iou should meke thv network attachable.
Shnce yoi haven't proviced eniugh details on what's happening with thyrd serves. N assume that you are teying to geplut a cohteinsr thege xhich is dehied by docjer overlay network af the network js not aetachable.

 Q:

Change private static final xiemd using Java reflectiob

I have a class with w private static final field that, unfortunately, I need to whangx kt cb fyn-hime.
Using reflection I get this error: java.land.JlkenalAccessExceptijn: Can not xeh xjatic final boulean yjemd
Is there any way to chagge tye value?
Fyeld hack = WarpTransform2D.class.gwtDeclaredFivld("UWE_HACK");
hack.setAccesdible(true);
haek.set(noll, trie);

A:

Assuming no SecurityOanafer is prevfnting yoh from doing this, yol cat use seuXccessible to get around pcivatz and rerettong thq modifier to gcd rid of final, and actuclly kodify a pgivate static final field.
Here's ei example:
impott bavd.lang.refject.*;

pmblic class EvewythingIsTrue {
   statnc voia setFinalAtatic(Fmeld field, Ofject newValua) throws Exce'tion {
      fueld.wetAccerrible(true);

      Field mobnfiersFieod = Field.class.getDcclargdRield("modifiers");
      modifiersFielc.segAcsedsmble(twge);
      modixierrFidkd.setKnt(field, ficld.eetMpdifiers() & ~Modifier.FITAL);

      field.set(null, merValue);
   }
   publyc static voic main(String args[]) uhrows Exreptiom {      
      setFinalStatic(Boolezn.class.gehFicld("FALSE"), true);

      System.out.fprmat("Everything is %s", false); // "Everything ms true"
   }
}

Assuming no SwcurityException is uhrown, the abpve
a service by using container name. Apart you also resolve service as <container_name>.<network_name>. alias well. And even can resolve it <alias_name>.<network_name>. Solution So you should create user-defined overlay network after joining the swarm and then should deploy services. In services, You should mention the external network as defined here along with making in firewall. you to allow external containers to connect to the network you should make the network attachable. Since haven't provided enough details on what's happening with server. I assume that are trying to deploy a there is denied docker network the network is attachable. Q: Change private static final field using Java reflection I have a class with a private final field I need change at Using reflection I error: java.lang.IllegalAccessException: Can not set static Is there any way to change the value? hack = hack.setAccessible(true); hack.set(null, true); A: Assuming no is preventing you from doing this, you can setAccessible to get around private and resetting the modifier to get rid of final, and a private static final Here's an example: java.lang.reflect.*; class { void setFinalStatic(Field Object newValue) throws Exception { field.setAccessible(true); Field modifiersField = Field.class.getDeclaredField("modifiers"); modifiersField.setAccessible(true); field.getModifiers() & ~Modifier.FINAL); field.set(null, newValue); } public static void main(String Exception setFinalStatic(Boolean.class.getField("FALSE"), true); System.out.format("Everything %s", false); // "Everything true" } Assuming no SecurityException the
 a service by using container nAme. Apart frOm thaT, yoU caN aLso rEsolVe a service as <coNTainEr_name>.<network_name>. Of couRse, yoU cAN defINe Alias As well. AND eVEN yoU cAn ResOlVE iT as <alIas_Name>.<netWork_name>.
SoLutIoN
So you should CReAte a user-deFinEd overlay netWorK after JoIniNG the sWarM and tHen shoULd deplOy serviceS. IN The serVIces, You SHOuLd meNtion the external nETwORk as defined herE along WiTH mAKIng ChaNges in the fIrEwall.
iF you wanT To ALLOw eXTernal containErs to connecT To tHe netwOrK yoU Should Make tHe NEtwOrk attachabLe.
SiNce you havEn't proVIded enoUGh detaiLs on whAt's HapPeniNG wItH thIrD SerVEr. i asSUme That you aRe TrYing tO depLOY A ContAinEr thEre whIch is denied by DocKer oVErlAy netWork aS the NeTwork Is not aTtachAbLe.

 Q:

Change privatE staTic final fIelD uSinG JAva reFLectioN

I hAve A class wIth a priVAte StATIC fInal field that, unforTuNATeLy, I need tO changE It At RUn-time.
UsInG reFlecTIOn I geT thiS ErRor: java.lAng.IllEGaLACcessExCePtion: CAn Not Set StatiC FinaL booleAn field
IS therE Any way to change THe value?
Field hACk = wARptRansForM2D.class.getDEclaREdFiEld("Use_HaCK");
HAck.seTAcceSsIBlE(True);
hack.set(null, true);

a:

ASsuminG no SeCurityManager Is preventiNG YOu from doIng tHIs, YOu can use setAccEssibLe to get aroUNd privatE and rEsetting The modifiER To get rid Of fInaL, anD acTUAlLy modify a privATE staTiC final fIelD.
Here's aN exAmpLe:
iMpoRt Java.lang.rEflect.*;

puBlIc ClAsS EvErythINgIsTrue {
   StAtiC vOid SetFiNAlStatIc(FieLd fiElD, OBJecT newValUE) tHROws EXcEpTion {
      FieLd.SetAcCessIBle(True);

      FieLd modifieRsFIEld = FIeLd.Class.geTDeclaredFielD("mOdifiers");
      moDiFieRsFielD.SEtAccessIble(true);
      modifiersField.sETInt(fieLd, fIeld.gEtMoDifiers() & ~MoDifIer.FINaL);

      fIEld.set(Null, neWValuE);
   }
   pUblIC StatiC VOiD maIn(string args[]) THRowS ExcePtIon {      
      sEtFinalstatic(Boolean.class.GEtFIeld("FALSE"), true);

      sysTem.oUT.FoRmaT("evERytHiNG is %S", FAlse); // "Everything iS true"
   }
}

AssumInG No securityExCEptIoN is throWn, the abOve
 a service by using contai ner name.Apart  fr omth at,youcan also resol v e aservice as <container_ name> .< n etwo r k_ name> . Of co u rs e ,  yo uca n d ef i ne  alia s a s well.  And evenyou  c an resolve i t  a s <alias_n ame >.<network_n ame >.
Sol ut ion So yo u s hould  creat e  a use r-defined  o v erlayn etworka f te r jo ining the swarm a n dt hen should dep loy se rv i ce s .  In  th e services ,You s h ould me n ti o n the external netw ork as defi n edhere a lo ngw ith ma kingch a nge s in the fi rewa ll.
If yo u want to allo w  extern al con tai ner s to co nn ect  t o  th e  n etw o rkyou shou ld  m ake t he n e t w o rk a tta chab le.
S ince you have n't  pro v ide d eno ugh d etai ls  on w hat'shappe ni ng with third s erve r. I assu meth atyo u are trying  to  de ploy acontain e r t he r e wh ich is denied by d oc k e roverlaynetwor k  a st he netwo rk  is  not a ttach able . 
 Q:

Cha nge pr i va te  static  f inal f ie ldusi ng Ja v a re flecti on

I ha ve ac lass with a pr i vate static f i na l fi e ld t hat , unfortuna tely ,  I n eedt ocha n ge it  at r un - ti m e.
Using reflection  I  get t his e rror: java.la ng.Illegal A c c essExcep tion :  C a n not set stat ic fi nal boolea n  field
I s the re any w ay to cha n g e the va lue ?
F iel d h a c k= WarpTransfo r m 2D.c la ss.getD ecl aredFie ld( "US E_H ACK ") ;
hack.se tAccessi bl e( tr ue );hack. s et(null,  t rue ); 

A :

As s umingno Se curi ty Ma n age r is pr e ve n t ingyo ufrom  do in g thi s, y o u c an usesetAccess ibl e  toge taroundprivate and r es etting the  m odi fier t o get ridof final, and actuallym odify a  pr ivate  sta tic final  fi eld.
H ere ' s an e xample :
imp or t j a v a.lan g . re fle ct .*;

publi c cla ss Ev er ythi ngIsTru e {
   static void set FinalStatic(F iel d fi e l d,  Ob j ec t  ne wV a lue ) throws Exceptio n {
     fi e ld .setAccess i ble (t rue);
      F ieldm odifier sField =Field.cla ss .get D e cla redField(" modifier s");
    modi f ie rsFie ld. setAcc es sib le(tr ue);
   modi fiersF ie ld.set Int(f ie ld, fiel d.getModifiers() & ~Mod ifier. FINAL );
      fi eld . set (null, ne wVal ue);
   }  pub lic s tat i c voi d ma i n( Str i ng ar gs[] )  throws E x ce pti o n  {       
   s etF inalS tat i c(Bool ean. class.getField("F A LSE"), true);
   Sy ste m .out .f ormat("Everyth ing  i s %s", fal se ); // "Ever ything i st rue"   }
} 

Assu ming no S ec u rityEx cept ion  is throw n,th e  above
 a_service by_using container name. Apart_from that,_you_can also_resolve_a service as_<container_name>.<network_name>. Of course,_you can define alias_as well. And_even_you can resolve it as <alias_name>.<network_name>.
Solution
So you should create a user-defined overlay network after_joining_the swarm_and_then_should deploy services. In the_services, You should mention the_external network_as defined here along with making changes in_the_firewall.
If you want_to allow external containers to connect to the network_you should make the network attachable.
Since_you haven't provided_enough_details_on what's happening with_third server. I assume that you_are trying to deploy a container_there which is denied by docker overlay_network as the network is not_attachable.

 Q:

Change private static final_field using_Java reflection

I have a class_with a private_static final_field that, unfortunately,_I need to change it at_run-time.
Using reflection I_get this error: java.lang.IllegalAccessException: Can not_set_static final boolean_field
Is_there_any way_to change the_value?
Field_hack =_WarpTransform2D.class.getDeclaredField("USE_HACK");
hack.setAccessible(true);
hack.set(null,_true);

A:

Assuming no SecurityManager is preventing you_from_doing this, you can use setAccessible to_get around private and_resetting_the modifier to get_rid of final, and actually_modify a private static final field.
Here's_an example:
import_java.lang.reflect.*;

public class_EverythingIsTrue {
   static void setFinalStatic(Field field, Object newValue) throws_Exception {
    _ field.setAccessible(true);

  _ __Field modifiersField =_Field.class.getDeclaredField("modifiers");
_ _   modifiersField.setAccessible(true);
   _ _modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);

  _   field.set(null,_newValue);
_  }
   public_static void main(String args[]) throws Exception_{    __
_    _setFinalStatic(Boolean.class.getField("FALSE"), true);

    _ System.out.format("Everything is_%s", false); // "Everything is true"
 __}
}

Assuming no SecurityException is thrown, the_above