rufushuang

FOR those who encountered "Algorithm negotiation fail" exception.

6

You'd better read http://stackoverflow.com/questions/6263630/jschexception-algorithm-negotiation-fail And i found the sshd_config method in Malte Clasen's comment, really works for me. Add one line: KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1 in /etc/ssh/sshd_config, if you can.

JVMUtil performance improvement

1

https://github.com/apache/dubbo/blob/3.0/dubbo-common/src/main/java/org/apache/dubbo/common/utils/JVMUtil.java JVMUtil. jstack方法调用整体使用OutputStream作为输出可提升性能，而内部JVMUtil.getThreadDumpString使用String长字符串拼接反而降低了性能。 建议修改内部JVMUtil.getThreadDumpString方法同样为流式处理，减少字符串拼接的性能开销 同时，getThreadDumpString方法内部，可能还考虑性能影响，增加了栈深度控制（默认32）。 这个深度控制、对性能的提升，可能没有流式处理改造能带来的性能提升高。建议应先修改流式处理以提升性能。是否可经测试评估性能影响，取消栈深度控制。以便dubbo的threaddump能够使用在各类Thread分析工具中（如flamegraph.pl等）。

When you find NO response to opening a .shp file, this is caused an exception in java.lang.StringIndexOutOfBoundsException: String index out of range: 402 at java.lang.AbstractStringBuilder.substring(Unknown Source) at java.lang.StringBuffer.substring(Unknown Source) at...

``` C:\Users\Administrator\Desktop>pcap_tools data2.pcap Mode : http C:/Ruby193/lib/ruby/gems/1.9.1/gems/popen4-0.1.2/lib/popen4.rb:49:in `popen4': uninitialized constant POpen4::Open4 (NameError) from C:/Ruby193/lib/ruby/gems/1.9.1/gems/pcap_tools-0.0.7/lib/pcap_tools/loader.rb:102:in `load_file' from C:/Ruby193/lib/ruby/gems/1.9.1/gems/pcap_tools-0.0.7/bin/pcap_tools:138:in `block in ' from C:/Ruby193/lib/ruby/gems/1.9.1/gems/pcap_tools-0.0.7/bin/pcap_tools:137:in `each' from C:/Ruby193/lib/ruby/gems/1.9.1/gems/pcap_tools-0.0.7/bin/pcap_tools:137:in `' from C:/Ruby193/bin/pcap_tools:23:in `load' from...