Java Selenium failing to open web page on firefox -

i'm using selenium 3.4.0, java 1.8 , firefox 54.0.1(64 bit). i'm getting null pointer exception when try open link firefox. when use selenium/python works fine, i'm trying run code guru 99 page (https://www.guru99.com/first-webdriver-script.html).i've searched see if else has had problem, can't find solutions. following output:

1501246654252   addons.manager  debug   application has been upgraded 1501246654291   addons.manager  debug   loaded provider scope resource://gre/modules/addons/xpiprovider.jsm: ["xpiprovider"] 1501246654293   addons.manager  debug   loaded provider scope resource://gre/modules/lightweightthememanager.jsm: ["lightweightthememanager"] 1501246654297   addons.manager  debug   loaded provider scope resource://gre/modules/addons/gmpprovider.jsm 1501246654299   addons.manager  debug   loaded provider scope resource://gre/modules/addons/pluginprovider.jsm 1501246654299   addons.manager  debug   starting provider: xpiprovider 1501246654300   addons.xpi  debug   startup 1501246654301   addons.xpi  info    mapping fxdriver@googlecode.com c:\users\chrisg~1\appdata\local\temp\anonymous8191426632770324153webdriver-profile\extensions\fxdriver@googlecode.com 1501246654301   addons.xpi  debug   ignoring file entry name not valid add-on id: c:\users\chrisg~1\appdata\local\temp\anonymous8191426632770324153webdriver-profile\extensions\webdriver-staging 1501246654301   addons.xpi  info    removing system add-on upgrades. 1501246654301   addons.xpi  info    systemaddoninstalllocation directory missing 1501246654302   addons.xpi  info    mapping aushelper@mozilla.org c:\program files\mozilla firefox\browser\features\aushelper@mozilla.org.xpi 1501246654303   addons.xpi  info    mapping e10srollout@mozilla.org c:\program files\mozilla firefox\browser\features\e10srollout@mozilla.org.xpi 1501246654303   addons.xpi  info    mapping firefox@getpocket.com c:\program files\mozilla firefox\browser\features\firefox@getpocket.com.xpi 1501246654303   addons.xpi  info    mapping screenshots@mozilla.org c:\program files\mozilla firefox\browser\features\screenshots@mozilla.org.xpi 1501246654304   addons.xpi  info    mapping webcompat@mozilla.org c:\program files\mozilla firefox\browser\features\webcompat@mozilla.org.xpi 1501246654305   addons.xpi  info    mapping {972ce4c6-7e08-4474-a285-3208198ce6fd} c:\program files\mozilla firefox\browser\extensions\{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi 1501246654305   addons.xpi  debug   skipping unavailable install location app-system-share 1501246654305   addons.xpi  debug   skipping unavailable install location app-system-local 1501246654306   addons.xpi  debug   checkforchanges 1501246654306   addons.xpi  info    systemaddoninstalllocation directory missing 1501246654307   addons.xpi  debug   loaded add-on state prefs: {} 1501246654308   addons.xpi  debug   new add-on fxdriver@googlecode.com in app-profile 1501246654308   addons.xpi  debug   getmodtime: recursive scan of fxdriver@googlecode.com 1501246654313   addons.xpi  debug   new add-on aushelper@mozilla.org in app-system-defaults 1501246654313   addons.xpi  debug   getmodtime: recursive scan of aushelper@mozilla.org 1501246654314   addons.xpi  debug   new add-on e10srollout@mozilla.org in app-system-defaults 1501246654315   addons.xpi  debug   getmodtime: recursive scan of e10srollout@mozilla.org 1501246654315   addons.xpi  debug   new add-on firefox@getpocket.com in app-system-defaults 1501246654315   addons.xpi  debug   getmodtime: recursive scan of firefox@getpocket.com 1501246654315   addons.xpi  debug   new add-on screenshots@mozilla.org in app-system-defaults 1501246654316   addons.xpi  debug   getmodtime: recursive scan of screenshots@mozilla.org 1501246654316   addons.xpi  debug   new add-on webcompat@mozilla.org in app-system-defaults 1501246654316   addons.xpi  debug   getmodtime: recursive scan of webcompat@mozilla.org 1501246654317   addons.xpi  debug   new add-on {972ce4c6-7e08-4474-a285-3208198ce6fd} in app-global 1501246654317   addons.xpi  debug   getmodtime: recursive scan of {972ce4c6-7e08-4474-a285-3208198ce6fd} 1501246654317   addons.xpi  debug   getinstallstate changed: true, state: {"app-profile":{"fxdriver@googlecode.com":{"d":"c:\\users\\chrisg~1\\appdata\\local\\temp\\anonymous8191426632770324153webdriver-profile\\extensions\\fxdriver@googlecode.com","st":1501246654037,"mt":1501246653985}},"app-system-defaults":{"aushelper@mozilla.org":{"d":"c:\\program files\\mozilla firefox\\browser\\features\\aushelper@mozilla.org.xpi","st":1498667065000},"e10srollout@mozilla.org":{"d":"c:\\program files\\mozilla firefox\\browser\\features\\e10srollout@mozilla.org.xpi","st":1498667065000},"firefox@getpocket.com":{"d":"c:\\program files\\mozilla firefox\\browser\\features\\firefox@getpocket.com.xpi","st":1498667066000},"screenshots@mozilla.org":{"d":"c:\\program files\\mozilla firefox\\browser\\features\\screenshots@mozilla.org.xpi","st":1498667067000},"webcompat@mozilla.org":{"d":"c:\\program files\\mozilla firefox\\browser\\features\\webcompat@mozilla.org.xpi","st":1498667066000}},"app-global":{"{972ce4c6-7e08-4474-a285-3208198ce6fd}":{"d":"c:\\program files\\mozilla firefox\\browser\\extensions\\{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi","st":1498667065000}}} 1501246654324   addons.xpi-utils    debug   opening xpi database c:\users\chrisg~1\appdata\local\temp\anonymous8191426632770324153webdriver-profile\extensions.json 1501246654326   addons.xpi-utils    debug   new add-on fxdriver@googlecode.com installed in app-profile *** blocklist::_loadblocklistfromfile: blocklist disabled 1501246654340   addons.xpi  warn    add-on fxdriver@googlecode.com not correctly signed. 1501246654340   addons.xpi  warn    add-on fxdriver@googlecode.com not correctly signed. 1501246654343   deferredsave.extensions.json    debug   save changes 1501246654343   addons.xpi-utils    debug   new add-on aushelper@mozilla.org installed in app-system-defaults 1501246654346   deferredsave.extensions.json    debug   starting timer 1501246654349   deferredsave.extensions.json    debug   save changes 1501246654349   addons.xpi-utils    debug   new add-on e10srollout@mozilla.org installed in app-system-defaults 1501246654354   deferredsave.extensions.json    debug   save changes 1501246654355   addons.xpi-utils    debug   new add-on firefox@getpocket.com installed in app-system-defaults 1501246654359   deferredsave.extensions.json    debug   save changes 1501246654359   addons.xpi-utils    debug   new add-on screenshots@mozilla.org installed in app-system-defaults 1501246654365   deferredsave.extensions.json    debug   save changes 1501246654365   addons.xpi-utils    debug   new add-on webcompat@mozilla.org installed in app-system-defaults 1501246654369   deferredsave.extensions.json    debug   save changes 1501246654370   addons.xpi-utils    debug   new add-on {972ce4c6-7e08-4474-a285-3208198ce6fd} installed in app-global 1501246654373   deferredsave.extensions.json    debug   starting write 1501246654379   deferredsave.extensions.json    debug   save changes 1501246654380   deferredsave.extensions.json    debug   data changed while write in progress 1501246654380   addons.manager  debug   registering startup change 'installed' fxdriver@googlecode.com 1501246654380   addons.xpi-utils    debug   make addon app-profile:fxdriver@googlecode.com visible 1501246654381   deferredsave.extensions.json    debug   save changes 1501246654381   addons.manager  debug   registering startup change 'installed' aushelper@mozilla.org 1501246654390   addons.xpi  debug   loading bootstrap scope c:\program files\mozilla firefox\browser\features\aushelper@mozilla.org.xpi 1501246654394   addons.xpi  debug   calling bootstrap method install on aushelper@mozilla.org version 2.0 1501246654395   addons.xpi-utils    debug   make addon app-system-defaults:aushelper@mozilla.org visible 1501246654395   deferredsave.extensions.json    debug   save changes 1501246654395   addons.manager  debug   registering startup change 'installed' e10srollout@mozilla.org 1501246654396   addons.xpi  debug   loading bootstrap scope c:\program files\mozilla firefox\browser\features\e10srollout@mozilla.org.xpi 1501246654399   addons.xpi  debug   calling bootstrap method install on e10srollout@mozilla.org version 1.50 1501246654400   addons.xpi-utils    debug   make addon app-system-defaults:e10srollout@mozilla.org visible 1501246654400   deferredsave.extensions.json    debug   save changes 1501246654400   addons.manager  debug   registering startup change 'installed' firefox@getpocket.com 1501246654401   addons.xpi  debug   loading bootstrap scope c:\program files\mozilla firefox\browser\features\firefox@getpocket.com.xpi 1501246654405   addons.xpi  debug   calling bootstrap method install on firefox@getpocket.com version 1.0.5 1501246654405   addons.xpi-utils    debug   make addon app-system-defaults:firefox@getpocket.com visible 1501246654406   deferredsave.extensions.json    debug   save changes 1501246654406   addons.manager  debug   registering startup change 'installed' screenshots@mozilla.org 1501246654407   addons.xpi  debug   loading bootstrap scope c:\program files\mozilla firefox\browser\features\screenshots@mozilla.org.xpi 1501246654410   addons.xpi  debug   calling bootstrap method install on screenshots@mozilla.org version 6.6.0 1501246654410   addons.xpi-utils    debug   make addon app-system-defaults:screenshots@mozilla.org visible 1501246654410   deferredsave.extensions.json    debug   save changes 1501246654410   addons.manager  debug   registering startup change 'installed' webcompat@mozilla.org 1501246654411   addons.xpi  debug   loading bootstrap scope c:\program files\mozilla firefox\browser\features\webcompat@mozilla.org.xpi 1501246654413   addons.xpi  debug   calling bootstrap method install on webcompat@mozilla.org version 1.1 1501246654413   addons.xpi-utils    debug   make addon app-system-defaults:webcompat@mozilla.org visible 1501246654413   deferredsave.extensions.json    debug   save changes 1501246654414   addons.xpi-utils    debug   make addon app-global:{972ce4c6-7e08-4474-a285-3208198ce6fd} visible 1501246654414   deferredsave.extensions.json    debug   save changes 1501246654414   addons.xpi  debug   updating xpistate {"id":"fxdriver@googlecode.com","syncguid":"{284a66e3-05a6-4d03-b43d-a92a5f93e2f7}","location":"app-profile","version":"3.4.0","type":"extension","internalname":null,"updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":null,"icon64url":null,"defaultlocale":{"name":"firefox webdriver","description":"webdriver implementation firefox","creator":"simon stewart","homepageurl":null},"visible":true,"active":false,"userdisabled":false,"appdisabled":true,"descriptor":"c:\\users\\chrisg~1\\appdata\\local\\temp\\anonymous8191426632770324153webdriver-profile\\extensions\\fxdriver@googlecode.com","installdate":1501246654037,"updatedate":1501246654037,"applybackgroundupdates":1,"bootstrap":false,"skinnable":false,"size":3303362,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":true,"hasbinarycomponents":false,"strictcompatibility":false,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"3.0","maxversion":"48.0"}],"targetplatforms":[{"os":"darwin","abi":null},{"os":"sunos","abi":null},{"os":"freebsd","abi":null},{"os":"openbsd","abi":null},{"os":"winnt","abi":null},{"os":"linux","abi":null}],"multiprocesscompatible":false,"signedstate":0,"seen":true,"dependencies":[],"hasembeddedwebextension":false,"mpcoptedout":false,"userpermissions":null} 1501246654415   addons.xpi  debug   updating xpistate {"id":"aushelper@mozilla.org","syncguid":"{a337c938-f101-467f-8334-642c2957ef77}","location":"app-system-defaults","version":"2.0","type":"extension","internalname":null,"updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":null,"icon64url":null,"defaultlocale":{"name":"application update service helper","description":"sets value(s) in update url based on custom checks.","creator":null,"homepageurl":null},"visible":true,"active":true,"userdisabled":false,"appdisabled":false,"descriptor":"c:\\program files\\mozilla firefox\\browser\\features\\aushelper@mozilla.org.xpi","installdate":1498667065000,"updatedate":1498667065000,"applybackgroundupdates":1,"bootstrap":true,"skinnable":false,"size":8488,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":false,"hasbinarycomponents":false,"strictcompatibility":false,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"54.0.1","maxversion":"54.*"}],"targetplatforms":[],"multiprocesscompatible":true,"seen":true,"dependencies":[],"hasembeddedwebextension":false,"mpcoptedout":false,"userpermissions":null} 1501246654415   addons.xpi  debug   getmodtime: recursive scan of aushelper@mozilla.org 1501246654415   addons.xpi  debug   updating xpistate {"id":"e10srollout@mozilla.org","syncguid":"{253d1e2b-244f-48a3-8215-48fd1ea043b0}","location":"app-system-defaults","version":"1.50","type":"extension","internalname":null,"updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":null,"icon64url":null,"defaultlocale":{"name":"multi-process staged rollout","description":"staged rollout of firefox multi-process feature.","creator":null,"homepageurl":null},"visible":true,"active":true,"userdisabled":false,"appdisabled":false,"descriptor":"c:\\program files\\mozilla firefox\\browser\\features\\e10srollout@mozilla.org.xpi","installdate":1498667065000,"updatedate":1498667065000,"applybackgroundupdates":1,"bootstrap":true,"skinnable":false,"size":12519,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":false,"hasbinarycomponents":false,"strictcompatibility":false,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"54.0.1","maxversion":"54.*"}],"targetplatforms":[],"multiprocesscompatible":true,"seen":true,"dependencies":[],"hasembeddedwebextension":false,"mpcoptedout":false,"userpermissions":null} 1501246654415   addons.xpi  debug   getmodtime: recursive scan of e10srollout@mozilla.org 1501246654416   addons.xpi  debug   updating xpistate {"id":"firefox@getpocket.com","syncguid":"{82e97246-464d-494a-92d5-df6243a967d5}","location":"app-system-defaults","version":"1.0.5","type":"extension","internalname":null,"updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":null,"icon64url":null,"defaultlocale":{"name":"pocket","description":"when find want view later, put in pocket.","creator":null,"homepageurl":null},"visible":true,"active":true,"userdisabled":false,"appdisabled":false,"descriptor":"c:\\program files\\mozilla firefox\\browser\\features\\firefox@getpocket.com.xpi","installdate":1498667066000,"updatedate":1498667066000,"applybackgroundupdates":1,"bootstrap":true,"skinnable":false,"size":913906,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":false,"hasbinarycomponents":false,"strictcompatibility":false,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"54.0.1","maxversion":"54.*"}],"targetplatforms":[],"multiprocesscompatible":true,"seen":true,"dependencies":[],"hasembeddedwebextension":false,"mpcoptedout":false,"userpermissions":null} 1501246654416   addons.xpi  debug   getmodtime: recursive scan of firefox@getpocket.com 1501246654417   addons.xpi  debug   updating xpistate {"id":"screenshots@mozilla.org","syncguid":"{88407b9c-4ff8-4d68-9615-aa613dbe559f}","location":"app-system-defaults","version":"6.6.0","type":"extension","internalname":null,"updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":null,"icon64url":null,"defaultlocale":{"name":"firefox screenshots","description":null,"creator":null,"homepageurl":"https://pageshot.net/"},"visible":true,"active":true,"userdisabled":false,"appdisabled":false,"descriptor":"c:\\program files\\mozilla firefox\\browser\\features\\screenshots@mozilla.org.xpi","installdate":1498667067000,"updatedate":1498667067000,"applybackgroundupdates":1,"bootstrap":true,"skinnable":false,"size":716271,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":false,"hasbinarycomponents":false,"strictcompatibility":false,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"51.0a1","maxversion":"*"}],"targetplatforms":[],"multiprocesscompatible":true,"seen":true,"dependencies":[],"hasembeddedwebextension":false,"mpcoptedout":false,"userpermissions":null} 1501246654417   addons.xpi  debug   getmodtime: recursive scan of screenshots@mozilla.org 1501246654418   addons.xpi  debug   updating xpistate {"id":"webcompat@mozilla.org","syncguid":"{21466d10-4f5e-4882-9e6b-1d1c096fc15b}","location":"app-system-defaults","version":"1.1","type":"extension","internalname":null,"updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":null,"icon64url":null,"defaultlocale":{"name":"web compat","description":"urgent post-release fixes web compatibility.","creator":null,"homepageurl":null},"visible":true,"active":true,"userdisabled":false,"appdisabled":false,"descriptor":"c:\\program files\\mozilla firefox\\browser\\features\\webcompat@mozilla.org.xpi","installdate":1498667066000,"updatedate":1498667066000,"applybackgroundupdates":1,"bootstrap":true,"skinnable":false,"size":9006,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":false,"hasbinarycomponents":false,"strictcompatibility":false,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"54.0.1","maxversion":"54.*"}],"targetplatforms":[],"multiprocesscompatible":true,"seen":true,"dependencies":[],"hasembeddedwebextension":false,"mpcoptedout":false,"userpermissions":null} 1501246654418   addons.xpi  debug   getmodtime: recursive scan of webcompat@mozilla.org 1501246654419   addons.xpi  debug   updating xpistate {"id":"{972ce4c6-7e08-4474-a285-3208198ce6fd}","syncguid":"{374c68bf-b5ce-4e4f-a6c4-f1532a743336}","location":"app-global","version":"54.0.1","type":"theme","internalname":"classic/1.0","updateurl":null,"updatekey":null,"optionsurl":null,"optionstype":null,"abouturl":null,"icons":{},"iconurl":"chrome://browser/content/default-theme-icon.svg","icon64url":null,"defaultlocale":{"name":"default","description":"the default theme.","creator":"mozilla","homepageurl":null,"contributors":["mozilla contributors"]},"visible":true,"active":true,"userdisabled":false,"appdisabled":false,"descriptor":"c:\\program files\\mozilla firefox\\browser\\extensions\\{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi","installdate":1498667065000,"updatedate":1498667065000,"applybackgroundupdates":1,"skinnable":true,"size":8207,"sourceuri":null,"releasenotesuri":null,"softdisabled":false,"foreigninstall":false,"hasbinarycomponents":false,"strictcompatibility":true,"locales":[],"targetapplications":[{"id":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","minversion":"54.0.1","maxversion":"54.0.1"}],"targetplatforms":[],"seen":true,"dependencies":[],"hasembeddedwebextension":false,"userpermissions":null} 1501246654420   addons.xpi  debug   getmodtime: recursive scan of {972ce4c6-7e08-4474-a285-3208198ce6fd} 1501246654444   deferredsave.extensions.json    debug   save changes 1501246654444   addons.xpi  debug   updating database changes installed add-ons 1501246654444   addons.xpi-utils    debug   updating add-on states 1501246654445   addons.xpi-utils    debug   writing add-ons list 1501246654452   addons.xpi  debug   registering manifest c:\program files\mozilla firefox\browser\features\aushelper@mozilla.org.xpi 1501246654452   addons.xpi  debug   calling bootstrap method startup on aushelper@mozilla.org version 2.0 1501246654453   addons.xpi  debug   registering manifest c:\program files\mozilla firefox\browser\features\e10srollout@mozilla.org.xpi 1501246654454   addons.xpi  debug   calling bootstrap method startup on e10srollout@mozilla.org version 1.50 1501246654455   addons.xpi  debug   registering manifest c:\program files\mozilla firefox\browser\features\firefox@getpocket.com.xpi 1501246654456   addons.xpi  debug   calling bootstrap method startup on firefox@getpocket.com version 1.0.5 1501246654456   addons.xpi  debug   registering manifest c:\program files\mozilla firefox\browser\features\screenshots@mozilla.org.xpi 1501246654457   addons.xpi  debug   calling bootstrap method startup on screenshots@mozilla.org version 6.6.0 1501246654457   addons.xpi  debug   registering manifest c:\program files\mozilla firefox\browser\features\webcompat@mozilla.org.xpi 1501246654458   addons.xpi  debug   calling bootstrap method startup on webcompat@mozilla.org version 1.1 1501246654461   addons.manager  debug   registering shutdown blocker xpiprovider 1501246654462   addons.manager  debug   provider finished startup: xpiprovider 1501246654462   addons.manager  debug   starting provider: lightweightthememanager 1501246654462   addons.manager  debug   registering shutdown blocker lightweightthememanager 1501246654462   addons.manager  debug   provider finished startup: lightweightthememanager 1501246654462   addons.manager  debug   starting provider: gmpprovider 1501246654467   addons.manager  debug   registering shutdown blocker gmpprovider 1501246654467   addons.manager  debug   provider finished startup: gmpprovider 1501246654467   addons.manager  debug   starting provider: pluginprovider 1501246654467   addons.manager  debug   registering shutdown blocker pluginprovider 1501246654467   addons.manager  debug   provider finished startup: pluginprovider 1501246654468   addons.manager  debug   completed startup sequence 1501246654778   addons.manager  debug   starting provider: <unnamed-provider> 1501246654778   addons.manager  debug   registering shutdown blocker <unnamed-provider> 1501246654779   addons.manager  debug   provider finished startup: <unnamed-provider> 1501246654937   deferredsave.extensions.json    debug   write succeeded 1501246654937   addons.xpi-utils    debug   xpi database saved, setting schema version preference 19 1501246654937   deferredsave.extensions.json    debug   starting timer 1501246654951   addons.repository   debug   no addons.json found. 1501246654951   deferredsave.addons.json    debug   save changes 1501246654954   deferredsave.addons.json    debug   starting timer 1501246654976   addons.manager  debug   starting provider: previousexperimentprovider 1501246654976   addons.manager  debug   registering shutdown blocker previousexperimentprovider 1501246654976   addons.manager  debug   provider finished startup: previousexperimentprovider 1501246654979   deferredsave.extensions.json    debug   starting write 1501246655004   deferredsave.addons.json    debug   starting write 1501246655006   deferredsave.extensions.json    debug   write succeeded 1501246655021   deferredsave.addons.json    debug   write succeeded [gpu 7220] warning: pipe error: 109: file c:/builds/moz2_slave/m-rel-w64-00000000000000000000/build/src/ipc/chromium/src/chrome/common/ipc_channel_win.cc, line 346 exception in thread "main" org.openqa.selenium.remote.unreachablebrowserexception: not start new session. possible causes invalid address of remote server or browser start-up failure. build info: version: 'unknown', revision: 'unknown', time: 'unknown' system info: host: 'chris-pc', ip: '192.xxx.x.xxx', os.name: 'windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_141' driver info: driver.version: firefoxdriver     @ org.openqa.selenium.remote.remotewebdriver.execute(remotewebdriver.java:658)     @ org.openqa.selenium.remote.remotewebdriver.startsession(remotewebdriver.java:250)     @ org.openqa.selenium.remote.remotewebdriver.startsession(remotewebdriver.java:236)     @ org.openqa.selenium.remote.remotewebdriver.<init>(remotewebdriver.java:137)     @ org.openqa.selenium.firefox.firefoxdriver.<init>(firefoxdriver.java:191)     @ org.openqa.selenium.firefox.firefoxdriver.<init>(firefoxdriver.java:108)     @ org.openqa.selenium.firefox.firefoxdriver.<init>(firefoxdriver.java:104)     @ newpackage.myclass.main(myclass.java:12) caused by: java.lang.nullpointerexception     @ org.openqa.selenium.remote.service.driverservice.waituntilavailable(driverservice.java:192)     @ org.openqa.selenium.firefox.xpidriverservice.start(xpidriverservice.java:94)     @ org.openqa.selenium.remote.service.drivercommandexecutor.execute(drivercommandexecutor.java:78)     @ org.openqa.selenium.remote.remotewebdriver.execute(remotewebdriver.java:637)     ... 7 more 

here answer question:

the error unreachablebrowserexception: not start new session. possible causes invalid address of remote server or browser start-up failure says all.

as per guru99.com mentioned use webdriver.firefox.marionette within system.setproperty. in selenium 3.x using webdriver.gecko.driver instead.

so consider changing line of code:

system.setproperty("webdriver.firefox.marionette","c:\\geckodriver.exe"); 

to:

system.setproperty("webdriver.gecko.driver","c:\\your_directory\\geckodriver.exe"); 

let me know if answers question.