我使用libhdfs连接并写入hdfs系统。该程序工作正常，但是当我将GDB附加到它时，它在hdfsConnect中进行了段错误，但是连接通过并且我能够写入hdfs系统。但有时，连接不会发生。 seg故障困扰着我。这是代码和GDB BT。
#include "/home/hadoop_from_source/hdfs.h"
#include <jni.h>
#include <iostream>
int main (int arg, char* args[]) {
hdfsFS hdfsFs = hdfsConnect("172.19.108.136",9000);
if (hdfsFs != NULL)
std:: cout << "Success" << std::endl;
else
std:: cout << "Fail " << std::endl;
}
编译和链接：
g++ test.cpp -o test.o -lhdfs -L .
GDB：
451 struct hdfsBuilder *bld = hdfsNewBuilder();
(gdb)
452 if (!bld)
(gdb)
451 struct hdfsBuilder *bld = hdfsNewBuilder();
(gdb)
452 if (!bld)
(gdb)
454 hdfsBuilderSetNameNode(bld, host);
(gdb)
455 hdfsBuilderSetNameNodePort(bld, port);
(gdb)
456 return hdfsBuilderConnect(bld);
(gdb)
457 }
(gdb)
456 return hdfsBuilderConnect(bld);
(gdb)
0x00007ffff7df1e98 in hdfsBuilderConnect@plt () from ./libhdfs.so.0.0.0
(gdb)
Single stepping until exit from function hdfsBuilderConnect@plt,
which has no line number information.
0x00007ffff7df1df8 in ?? () from ./libhdfs.so.0.0.0
(gdb) nexti
0x00007ffff7df1dfe in ?? () from ./libhdfs.so.0.0.0
(gdb)
0x000000302f0146c0 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146c4 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146c8 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146cd in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146d2 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146d7 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146dc in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146e1 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146e6 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146eb in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146f0 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146f5 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146f8 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f0146fd in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f014702 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f014707 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f01470c in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f014711 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f014716 in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f01471a in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
0x000000302f01471e in _dl_runtime_resolve () from /lib64/ld-linux-x86-64.so.2
(gdb)
hdfsBuilderConnect (bld=0x601370)
at /home/hadoop-2.2.0-src/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/hdfs.c:563
563 {
(gdb)
0x00007ffff7df8385 563 {
(gdb)
0x00007ffff7df838a 563 {
(gdb)
0x00007ffff7df838d 563 {
(gdb)
0x00007ffff7df8392 563 {
(gdb)
0x00007ffff7df8397 563 {
(gdb)
0x00007ffff7df839c 563 {
(gdb)
0x00007ffff7df83a1 563 {
(gdb)
565 jobject jConfiguration = NULL, jFS = NULL, jURI = NULL, jCachePath = NULL;
(gdb)
566 jstring jURIString = NULL, jUserString = NULL;
(gdb)
0x00007ffff7df83c0 566 jstring jURIString = NULL, jUserString = NULL;
(gdb)
575 env = getJNIEnv();
(gdb)
[New Thread 0x7ffff2e41700 (LWP 7488)]
.
.
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff3ca99b5 in ?? ()
(gdb)