Error: internal server error (500)

Hello good people,
Am getting beaten,
I have so far captured 700 forms successfully, however these are text only
files, when I upload forms with photos I get the following error, error:
internal server error (500) at https:/... on looking through the catalina
files am failing to make send of it.
Please help me look through and advice as am time bound yet data is failing
to submit
N.B, Am using a fast internet connection - WIFI

Aug 10, 2015 8:11:44 PM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-0.0.0.0-8080
Aug 10, 2015 8:11:44 PM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-8443
Aug 10, 2015 8:11:45 PM org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina
Aug 10, 2015 8:11:45 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SEVERE: The web application [/ODKAggregate] appears to have started a
thread named
[C3P0PooledConnectionPoolManager[identityToken->1hge0y39a1fn18ad1lubm3e|73194df]-AdminTaskTimer]
but has failed to stop it. This is very likely to create a memory leak.
Aug 10, 2015 8:11:45 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SEVERE: The web application [/ODKAggregate] appears to have started a
thread named
[C3P0PooledConnectionPoolManager[identityToken->1hge0y39a1fn18ad1lubm3e|73194df]-HelperThread-#0]
but has failed to stop it. This is very likely to create a memory leak.
Aug 10, 2015 8:11:45 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SEVERE: The web application [/ODKAggregate] appears to have started a
thread named
[C3P0PooledConnectionPoolManager[identityToken->1hge0y39a1fn18ad1lubm3e|73194df]-HelperThread-#1]
but has failed to stop it. This is very likely to create a memory leak.
Aug 10, 2015 8:11:45 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SEVERE: The web application [/ODKAggregate] appears to have started a
thread named
[C3P0PooledConnectionPoolManager[identityToken->1hge0y39a1fn18ad1lubm3e|73194df]-HelperThread-#2]
but has failed to stop it. This is very likely to create a memory leak.
Aug 10, 2015 8:11:45 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SEVERE: The web application [/ODKAggregate] appears to have started a
thread named [Abandoned connection cleanup thread] but has failed to stop
it. This is very likely to create a memory leak.
Aug 10, 2015 8:11:45 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads
SEVERE: The web application [/ODKAggregate] appears to have started a
thread named [task_scheduler-3] but has failed to stop it. This is very
likely to create a memory leak.
Aug 10, 2015 8:11:47 PM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-0.0.0.0-8080
Aug 10, 2015 8:11:47 PM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8443
Aug 10, 2015 8:12:29 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal
performance in production environments was not found on the
java.library.path: C:\Program Files\Apache Software Foundation\Tomcat
6.0\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Program
Files\Java\jdk1.8.0_45\bin;http://www.canyouseeme.org/;C:\Program Files
(x86)\MySQL\MySQL Fabric 1.5.4 & MySQL Utilities 1.5.4 1.5;C:\Program
Files (x86)\MySQL\MySQL Fabric 1.5.4 & MySQL Utilities 1.5.4 1.5\Doctrine
extensions for PHP;C:\OpenSSL-Win64\bin;;.
Aug 10, 2015 8:12:30 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-0.0.0.0-8080
Aug 10, 2015 8:12:32 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8443
Aug 10, 2015 8:12:32 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 4203 ms
Aug 10, 2015 8:12:32 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Aug 10, 2015 8:12:32 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.43
Aug 10, 2015 8:12:32 PM org.apache.catalina.startup.HostConfig
deployDescriptor
INFO: Deploying configuration descriptor host-manager.xml
Aug 10, 2015 8:12:33 PM org.apache.catalina.startup.HostConfig
deployDescriptor
INFO: Deploying configuration descriptor manager.xml
Aug 10, 2015 8:12:34 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive ODKAggregate.war
Aug 10, 2015 8:12:48 PM org.apache.catalina.startup.HostConfig
deployDirectory
INFO: Deploying web application directory docs
Aug 10, 2015 8:12:48 PM org.apache.catalina.startup.HostConfig
deployDirectory
INFO: Deploying web application directory examples
Aug 10, 2015 8:12:48 PM org.apache.catalina.startup.HostConfig
deployDirectory
INFO: Deploying web application directory ROOT
Aug 10, 2015 8:12:48 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-0.0.0.0-8080
Aug 10, 2015 8:12:49 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8443
Aug 10, 2015 8:12:49 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Aug 10, 2015 8:12:49 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/31 config=null
Aug 10, 2015 8:12:49 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 17108 ms