有人能帮我理解火花作业日志中出现以下几行的可能原因吗?
2018-06-11T05:35:46,181 - INFO Executor任务启动工作任务328 :登录$class@54- TID 328等待堆上执行池的至少1/2N空闲2018-06-11T05:35:46,182 - INFO Executor任务启动工作任务329:UnsafeExternalSorter@202 - Thread 151溢出50.0 MB的排序数据到磁盘(迄今20次)
2018-06-11T05:35:46,188 - INFO Executor任务启动工作者任务322:UnsafeExternalSort
最近,我们程序中的一个用户也遇到了以下错误并向我们报告:java.lang.OutOfMemoryError: Failed to allocate a 3029656 byte allocation with 2838072 free bytes and 2MB until OOM, max allowed footprint 268435456, growth limit 268435456
我发现这个错误导致了一个DoS。您认为攻击者可以从此错误中获益吗?(就像缓冲区溢出。)
我是Java新手,正在等待您的评论。谢谢。
我在mac和linux上运行了以下代码:
#include <stdio.h>
#include <string.h>
int main (int argc, char *argv[]){
int value = 5;
char buffer_one[8], buffer_two[8];
strcpy(buffer_one, "one");
strcpy(buffer_two, "two");
printf("[BEFORE] buffer_two is at %p and contains \'%s\'\
我有以下代码:
int main(int argc, char *argv[]) {
int bufferSize = 8;
//Setting the buffer size here, which can cause a heap overflow
char *argsStr = malloc(bufferSize);
char *anotherStr = malloc(bufferSize);
//If argv[1] is greater than the buffer size, we will have an overflow
s