I installed JDK in linux 7.0 and exported classpath from profile.sh
And now whenever I run any command like javac or whereis java I get

Segmentation fault (core dumped)

What does it means? what should I do?

:(

I think it is related to memory area.

Segmentation fault's normally mean that the program is accessing memory that it should not. The (core dumped) part means that linux created a file called "core" that is an image of the programs memory when things went bad.

I can't tell you how to fix it, but you should find the core file and remove it. They can be huge.

Frank

I recommend that you search the support/readme files, because I remember installing JDK a few weeks ago, and there are workarounds to this problem.

Peter

I can't help you fix it, but from programming in C I can tell you what causes it. The most common cause is if you create an array with say, "X" items, and then commit the heinous crime of trying to add X + 1 items to it. C doesn't normally check such things, and would quite happily overwrite whatever is in memory beyond the end of the array - perhaps memory being used by another application.

If Linux detects that happening, it will terminate the program with a Segmentation fault. It wouldn't only be restricted to C programs of course.

As for the JDK having segmentation faults, don't ask me!

we had this problem on a server, the error was coming up due to faulty memory.
Once changed, it was all well.

Check our your /var/log/messages

see if there are any kernal errors.

thanks

Craig

Originally posted by ffeingol
Segmentation fault's normally mean that the program is accessing memory that it should not. The (core dumped) part means that linux created a file called "core" that is an image of the programs memory when things went bad.

I can't tell you how to fix it, but you should find the core file and remove it. They can be huge.

Frank

I deleted the core files but when I write javac same thing happens.
What should I do?

I deleted the core files but when I write javac same thing happens.

Jolly,
Please see my post, I already told you that problem is reported on the JDK page. (in fact, I think it is related to Redhat 7.1 and the C library)

Peter