现象：部署完项目打开浏览器访问的时候报404的错误。
定位：清空浏览器的缓存
查看tomcat的运行状况
打开log查看
结果：在log日志中发现如下（部署了三次）
1 Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000005c0000000, 8589934592, 0) failed; error='Cannot allocate memory' (errno=12) 2 # 3 # There is insufficient memory for the Java Runtime Environment to continue. 4 # Native memory allocation (mmap) failed to map 8589934592 bytes for committing reserved memory. 5 # An error report file with more information is saved as: 6 # /usr/local/tomcat8.1-warehouse/bin/hs_err_pid9288.log 7 Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000005c0000000, 8589934592, 0) failed; error='Cannot allocate memory' (errno=12) 8 # 9 # There is insufficient memory for the Java Runtime Environment to continue. 10 # Native memory allocation (mmap) failed to map 8589934592 bytes for committing reserved memory. 11 # An error report file with more information is saved as: 12 # /usr/local/tomcat8.1-warehouse/bin/hs_err_pid10610.log 13 Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000005c0000000, 8589934592, 0) failed; error='Cannot allocate memory' (errno=12) 14 # 15 # There is insufficient memory for the Java Runtime Environment to continue. 16 # Native memory allocation (mmap) failed to map 8589934592 bytes for committing reserved memory. 17 # An error report file with more information is saved as: 18 # /usr/local/tomcat8.1-warehouse/bin/hs_err_pid12228.log
解决办法：物理硬盘内存小而jvm的内存分配过大导致的，调整了jvm的内存大小重新访问可以了。嘎嘎