[Q] Some application is stopping my phone from booting - Android Q&A, Help & Troubleshooting

Somehow last night my phone (Galaxy S4 running AOSP 4.4.2) crashed and now it wont reboot. It just sticks on the screen with the four colours animation for ever. I tried deleting the Cache, and Davilik Cache but it has not fixed the problem .. after this is went through the Upgrading Android process for all the apps but then stuck on "Starting Apps" .. so pretty clearly some application is starting and has a problem and so my phone wont boot .. but is there anyway of finding out which application it is?? Im aware I can wipe data and start again but would like to solve the problem without this if its possible. I also tried re-flashing my ROM but it didnt help.
Thanks for any help in advance.

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If it helps anybody help me, I plugged my phone into usb while it is stuck in the bootloop and ran
adb logcat *:E .. here is the result
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
E/DataRouter( 198): USB Interface is open with 0x9
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 1 of 10
E/macloader( 210): CID info file will be created!!!
E/wcnss_service( 221): CAL file not found
E/wcnss_service( 221): Failed to open wcnss device : No such file or directory
E/mm-camera( 211): qcamsvr_start: old_mode = 3f
E/INSTHK ( 249): Checked...
E/PPDaemon( 217): Failed to open the config file!
E/PPDaemon( 217): Panel type: 8
E/rmt_storage( 223): Remote storage service is not supported on mdm target
E/AT_Distributor( 212): Failed to init ATD
E/mm-camera( 211): qcamsvr_load_gesture_lib Error opening gesture library
E/mm-camera( 211): Cannot init Gesture library
E/mm-camera( 211): camera_plugin_create_func: handle = 0xb6c10008, client_open_fn = 0xb6c0d565, destroy_fn = 0xb6c0db99
E/QC-time-services( 220): Daemon:genoff_boot_tod_init: Unable to set TOD at boot up
E/QC-time-services( 220): Daemon: Unable to set TOD at boot up
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init: qmi_client_get_service_list returned -2num_services 0
E/Diag_Lib( 195): Diag_LSM_Init: Failed to open handle to diag driver, error = 13
E/QCNEA ( 214): CnE Standard Version 4.01
E/QCNEA ( 214): CnE Pro Version 1.01
E/QCNEA ( 214): Cne WQE Version 0.1
E/QCNEA ( 214): Cne NSRM Version 1.01
E/Sensorhubs( 207): couldn't find 'ssp_context' input device
E/Sensorhubs( 207): SSPContext: open sensorhub device failed(-1)
E/PRDrmPlugIn( 202): PRDrmPlugin:RDrmPlugin
E/PRDrmPlugInImp( 202): PRDRMPluginAPI::create
E/PRDrmPlugInImp( 202): PRDRMPluginAPI::SetEventHandler
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 2 of 10
E/PRDrmPlugIn( 202): PRDrmPlugin:nGetSupportInfo, uniqueId = 0
E/Sensorhubs( 207): couldn't find 'gesture_sensor' input device
E/MediaPlayerFactory( 203): calling dlopen on FACTORY_LIB
E/MediaPlayerFactory( 203): calling dlsym on pFactoryLib for FACTORY_CREATE_FN
E/MediaPlayerFactory( 203): registering DASH Player factory...
E/QualcommCamera( 203): Qint android::get_number_of_cameras(): E
E/alsa_mixer( 203): Control open failed
E/ ( 203): [ACDB RTC]->rtc init done!->result [0]
E/Diag_Lib( 203): actp_diag_init: call diag init function with B50181DD
E/ ( 203): [ACDB ACPH]->actp diag init done!
E/ACDB-LOADER( 203): done with conversion, anc config size is 148
E/ACDB-LOADER( 203): done with conversion, anc config size is 148
E/ACDB-LOADER( 203): done with conversion, anc config size is 148
E/ACDB-LOADER( 203): done with conversion, anc config size is 148
E/ACDB-LOADER( 203): done with conversion, anc config size is 74
E/ACDB-LOADER( 203): done with conversion, anc config size is 74
E/AndroidRuntime( 201): cannot open customer xml file
E/AndroidRuntime( 201): /system/csc/customer.xml can't open file
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 3 of 10
E/ICD ( 194): There is no file or permission.
E/BootAnimation( 613): Could not open '/sys/devices/w1_bus_master1/w1_master_check_id'
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 4 of 10
E/EmojiFactory_jni( 201): Failed to load libemoji.so: dlopen failed: library "libemoji.so" not found
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 5 of 10
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init: qmi_client_get_service_list returned -2num_services 0
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 6 of 10
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 7 of 10
E/Sensors ( 768): getName gyro_sensor name file open error.
E/GyroSensor( 768): GyroSensor : getName of gyro_sensor failed.
E/TemperatureHumiditySensor( 768): Failed to open send_accuracy sysfs
E/Sensors ( 768): sensors__get_sensors_list gyro_sensor name file open error.
E/MagneticSensor( 768): enable, 122, data_fd = -1
E/GyroSensor( 768): enable, 148, data_fd = -1
E/TemperatureHumiditySensor( 768): enable, 216, data_fd = -1
E/TemperatureHumiditySensor( 768): enable, 216, data_fd = -1
E/Sensors ( 768): sensors__get_sensors_list gyro_sensor name file open error.
E/Sensors ( 768): sensors__get_sensors_list gyro_sensor name file open error.
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 8 of 10
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 9 of 10
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init: qmi_client_get_service_list returned -2num_services 0
E/kickstart-qcks( 226): Couldn't find "/dev/mdm", 10 of 10
E/kickstart-qcks( 226): '/dev/mdm' was not found
E/kickstart-qcks( 226): ERROR: Can't bring MDM9K out of reset
E/alsa_ucm( 203): EC_REF_RX mixer ctl: SLIM_RX
E/alsa_ucm( 203): EC_REF_RX mixer ctl: SLIM_RX
E/alsa_ucm( 203): EC_REF_RX mixer ctl: SLIM_RX
E/alsa_ucm( 203): EC_REF_RX mixer ctl: SLIM_RX
E/alsa_mixer( 203): Control open failed
E/ ( 203): csd_client_service_init: Invalid rx device 0, setting to handset
E/ ( 203): csd_client_service_init: Invalid tx device 0, setting to handset
E/alsa_ucm( 203): Invalid current verb value: Inactive - -1
E/alsa_ucm( 203): No valid device Speaker found
E/alsa_ucm( 203): Control device not initialized
E/alsa_ucm( 203): Control device not initialized
E/alsa_pcm( 203): cannot open device '/dev/snd/pcmC0D0p', errno 2
E/ALSADevice( 203): open: Failed to initialize ALSA device 'hw:0,0'
E/AudioHardwareALSA( 203): Device open failed
E/QMI_FW ( 203): xport_open: socket creation failed - 1
E/AudioPolicyManagerBase( 203): Not output found for attached devices 00000003
E/AudioPolicyManagerBase( 203): Failed to open primary output
E/AudioPolicyManagerBase( 203): getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION
E/AudioPolicyManagerBase( 203): getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION
E/Audio_Control_CSC( 203): /system/csc/sales_code.dat ==> cannot open file
E/AudioPolicyService( 203): couldn't init_check the audio policy (No such device)
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init: qmi_client_get_service_list returned -2num_services 0
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init: qmi_client_get_service_list returned -2num_services 0
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QMI_FW ( 220): QMUXD: WARNING qmi_qmux_if_pwr_up_init failed! rc=-1
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init: qmi_client_get_service_list returned -2num_services 0
E/QC-time-services( 220): Daemon:genoff_modem_qmi_init:retry count exceeds limitQMI init failed continuing withoutserver
E/QC-time-services( 220): Daemon: QMI init failed, QMI calls inactive
E/QC-time-services( 220): Daemon: Time-services: Waiting to acceptconnection
E/QMI_FW ( 203): QMUXD: Service_id=20 not found over conn_id=0
E/QMI_FW ( 203): QMUXD: Service_id=20 not found over conn_id=18
E/QMI_FW ( 203): QMUXD: Service_id=20 not found over conn_id=37
E/QMI_FW ( 203): open_lookup_sock_fd: Lookup sock fd creation failed
E/QMI_FW ( 203): QMUXD: Service_id=20 not found over conn_id=0
E/QMI_FW ( 203): QMUXD: Service_id=20 not found over conn_id=18
E/QMI_FW ( 203): QMUXD: Service_id=20 not found over conn_id=37
E/SensorHubManager( 768): JNI: sensorhubs_get_next_module: getSensorHubList: count= 2
E/SensorHubManager( 768): JNI: sensorhubs_get_next_module: getSensorHubList: count= 2
E/SensorHubManager( 768): JNI: sensorhubs_enabledisable: delay= 0
E/EventHub( 768): could not get driver version for /dev/input/mice, Not a typewriter
E/ConnectivityService( 768): Error in networkAttributes - ignoring attempt to define type 17
E/ConnectivityService( 768): Ignoring protectedNetwork 14
E/MobileDataStateTracker( 768): default: Ignoring feature request because could not acquire PhoneService
E/MobileDataStateTracker( 768): default: Could not enable APN type "default"
F/SystemServer( 768): BOOT FAILURE Creating Connectivity Engine Service
F/SystemServer( 768): java.lang.ClassNotFoundException: Didn't find class "com.quicinc.cne.CNE" on path: DexPathList[[],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
F/SystemServer( 768): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
F/SystemServer( 768): at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
F/SystemServer( 768): at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
F/SystemServer( 768): at com.android.server.ServerThread.initAndLoop(SystemServer.java:572)
F/SystemServer( 768): at com.android.server.SystemServer.main(SystemServer.java:1263)
F/SystemServer( 768): at java.lang.reflect.Method.invokeNative(Native Method)
F/SystemServer( 768): at java.lang.reflect.Method.invoke(Method.java:515)
F/SystemServer( 768): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1264)
F/SystemServer( 768): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1080)
F/SystemServer( 768): at dalvik.system.NativeStart.main(Native Method)
E/SystemServer( 768): Failed to load CNE class
E/SystemServer( 768): java.lang.ClassNotFoundException: Didn't find class "com.quicinc.cne.CNE" on path: DexPathList[[],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
E/SystemServer( 768): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
E/SystemServer( 768): at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
E/SystemServer( 768): at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
E/SystemServer( 768): at com.android.server.ServerThread.initAndLoop(SystemServer.java:572)
E/SystemServer( 768): at com.android.server.SystemServer.main(SystemServer.java:1263)
E/SystemServer( 768): at java.lang.reflect.Method.invokeNative(Native Method)
E/SystemServer( 768): at java.lang.reflect.Method.invoke(Method.java:515)
E/SystemServer( 768): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1264)
E/SystemServer( 768): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1080)
E/SystemServer( 768): at dalvik.system.NativeStart.main(Native Method)
E/wpa_supplicant( 1981): wpa_driver_nl80211_driver_cmd: failed to issue private commands
E/WifiStateMachine( 768): Unexpected BatchedScanResults :null
E/wpa_supplicant( 1981): wpa_driver_nl80211_driver_cmd: failed to issue private commands
E/ActivityManager( 768): Attempt to launch receivers of broadcast intent Intent { act=android.net.ConnectivityService.action.PKT_CNT_SAMPLE_INTERVAL_ELAPSED flg=0x4 (has extras) } before boot completion