21:56:16 INFO : Launching XSDB server: xsdb.bat C:/Xilinx/SDK/2015.4/scripts/xsdb/xsdb/xsdb-server.tcl
21:59:18 ERROR : Timed out. 180 seconds have elapsed while waiting for XSDB server to launch.
21:59:19 INFO : Launching XSDB server: xsdb.bat C:/Xilinx/SDK/2015.4/scripts/xsdb/xsdb/xsdb-server.tcl
22:02:19 ERROR : Timed out. 180 seconds have elapsed while waiting for XSDB server to launch.
22:02:19 ERROR : Failed to call init_repo
java.lang.Exception: java.lang.Error: Channel is waiting for Hello message
at org.eclipse.tcf.core.Command.<init>(Command.java:83)
at com.xilinx.sdk.xsdb.XSDBCommandManager$8.<init>(XSDBCommandManager.java:384)
at com.xilinx.sdk.xsdb.XSDBCommandManager.issueTcfCmd(XSDBCommandManager.java:384)
at com.xilinx.sdk.xsdb.XSDBCommandManager.access$4(XSDBCommandManager.java:381)
at com.xilinx.sdk.xsdb.XSDBCommandManager$7.run(XSDBCommandManager.java:376)
at org.eclipse.tcf.EventQueue.run(EventQueue.java:95)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Error: Channel is waiting for Hello message
at org.eclipse.tcf.core.AbstractChannel.sendCommand(AbstractChannel.java:874)
22:02:19 ERROR : Exception rasied in executing the command =Failed to call init_repo

官网给的解决方案：https://china.xilinx.com/support/answers/69263.html

但是并没解决啊

1. c:\Xilinx\SDK\2017.1\.settings64-Software_Development_Kit__SDK_.bat

2. xsdk -batch

顺利解决启动问题