Getting Error unable to find valid certification path to requested target

A little more info. I'm calling this sdk from tomcat webapp on java 1.7. If I call the api's directly (calling the https://api.dropbox.com/1/metadata/auto/?locale=en_US&list=true&file_limit=25000) using httpsURLConnection from the same webapp the ssl handshake completes. So your client certificate is in the jvm cacerts file. 

But if I go through your SDK it fails with the error I gave you. I would rather use your sdk so I don't have to find all the URLs and then parse all the response json. 

Here is the properties list

-- listing properties --
java.runtime.name=Java(TM) SE Runtime Environment
java.protocol.handler.pkgs=javax.net.ssl
sun.boot.library.path=C:\Udev\Hubble\jdk\jre\bin
java.vm.version=24.51-b03
shared.loader=
java.vm.vendor=Oracle Corporation
java.vendor.url=http://java.oracle.com/
path.separator=;
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
tomcat.util.buf.StringCache.byte.enabled=true
file.encoding.pkg=sun.io
user.script=
user.country=US
sun.java.launcher=SUN_STANDARD
sun.os.patch.level=Service Pack 1
tomcat.util.scan.StandardJarScanFilter.jarsToScan=log4j-core*.jar,log4j-taglib*.jar
java.vm.specification.name=Java Virtual Machine Specification
user.dir=C:\Udev\Hubble\tomcat\bin
java.runtime.version=1.7.0_51-b13
derby.system.home=C:\Udev\Hubble\Config
java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs=C:\Udev\Hubble\tomcat/common/endorsed
os.arch=amd64
java.io.tmpdir=C:\Udev\Hubble\tomcat\temp
line.separator=

java.vm.specification.vendor=Oracle Corporation
user.variant=
java.naming.factory.url.pkgs=org.apache.naming
os.name=Windows 7
sun.jnu.encoding=Cp1252
java.library.path=C:\Udev\Hubble\jdk\bin;C:\Udev\Hubble...
java.specification.name=Java Platform API Specification
java.class.version=51.0
sun.management.compiler=HotSpot 64-Bit Tiered Compilers
os.version=6.1
sun.io.useCanonCaches=false
user.home=C:\Users\aaghili.MANAGEDMETHODS
user.timezone=America/Denver
catalina.useNaming=true
java.awt.printerjob=sun.awt.windows.WPrinterJob
java.specification.version=1.7
file.encoding=Cp1252
tomcat.util.scan.StandardJarScanFilter.jarsToSkip=bootstrap.jar,commons-daemon.jar,tomc...
catalina.home=C:\Udev\Hubble\tomcat
user.name=aaghili
java.class.path=C:\Udev\Hubble\tomcat/bin/bootstrap.j...
java.naming.factory.initial=org.apache.naming.java.javaURLContext...
http.maxConnections=30
package.definition=sun.,java.,org.apache.catalina.,org.a...
java.vm.specification.version=1.7
sun.arch.data.model=64
java.home=C:\Udev\Hubble\jdk\jre
sun.java.command=org.apache.catalina.startup.Bootstrap...
java.specification.vendor=Oracle Corporation
user.language=en
awt.toolkit=sun.awt.windows.WToolkit
java.vm.info=mixed mode
java.version=1.7.0_51
java.ext.dirs=C:\Udev\Hubble\jdk\jre\lib\ext;C:\Win...
sun.boot.class.path=C:\Udev\Hubble\jdk\jre\lib\resources....
java.vendor=Oracle Corporation
server.loader=
catalina.base=C:\Udev\Hubble\tomcat
file.separator=\
java.vendor.url.bug=http://bugreport.sun.com/bugreport/
common.loader="${catalina.base}/lib","${catalina.ba...
sun.cpu.endian=little
sun.io.unicode.encoding=UnicodeLittle
package.access=sun.,org.apache.catalina.,org.apache....
sun.desktop=windows
sun.cpu.isalist=amd64