Install brekeke sip server on Raspberry Pi 3

1. Brekeke Product Name and Version:
Brekeke SIP server
sip3_6_2_5

2. Java version:
openjdk-7-jdk

3. OS type and the version:
Raspbian GNU/Linux 8

4. UA (phone), gateway or other hardware/software involved:
Raspberry Pi 3
5. Your problem:
SEVERE: Servlet.service() for servlet [gate] in context with path [/sip] threw exception
java.io.IOException: Exception caught.
at com.brekeke.web.Bean.startBean(Unknown Source)
at com.brekeke.web.GateServlet.performTask(Unknown Source)
at com.brekeke.web.GateServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException:
at com.brekeke.sipadmin.web.Login.execLogin(Unknown Source)
at com.brekeke.sipadmin.web.Login.exec(Unknown Source)
at com.brekeke.web.Bean.execMain(Unknown Source)
at com.brekeke.sipadmin.SipAdminBase.execMain(Unknown Source)
at com.brekeke.sipadmin.web.Login.execMain(Unknown Source)
at com.brekeke.web.Bean.execute(Unknown Source)
at com.brekeke.web.Bean.go(Unknown Source)

seems sip.war with something wrong with tomcat7 under java7 32 bits?

Are you trying to use Raspberry Pi 3 for running Brekeke SIP Server?
If so, I suppose it will not work because Brekeke SIP Server doesn't support ARM CPU.

But we have ARM edition of Brekeke SIP Server. If you are interested in it, please contact sales@brekeke.com .