unable to link C library. native methods (mlockall) will be disabled

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unable to link C library. native methods (mlockall) will be disabled

dup90011
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Re: unable to link C library. native methods (mlockall) will be disabled

Antonio Augusto Santos
I've run into this problem because my /tmp is mounted as noexec.
Worked around this using these java opts: "-Djna.tmpdir=/usr/share/elasticsearch/tmp -Djava.io.tmpdir=/usr/share/elasticsearch/tmp"

Cheers


On Wednesday, June 25, 2014 7:28:17 PM UTC-3, dup90011 wrote:


Centos 6(64)

Tried to start elasticsearch with mlockall. Started, but mlockall : false

Log file message:

[2014 ...,144][WARN ][common.jna] unable to link C library. native methods
(mlockall) will be disabled.

File jna-4.1.0.jar here: /usr/share/elasticsearch/lib/jna-4.1.0.jar

Any help?




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Re: unable to link C library. native methods (mlockall) will be disabled

dup90011
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Re: unable to link C library. native methods (mlockall) will be disabled

Antonio Augusto Santos-2
The ES devs are around and they may answer your question. But real support only on paid version.


On Thu, Jun 26, 2014 at 4:11 PM, dup90011 <[hidden email]> wrote:
Hmmm ...

How /tmp affected link C library?

My /tmp is fine

Any elasticsearch support exists here or only for paid version?




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Re: unable to link C library. native methods (mlockall) will be disabled

joergprante@gmail.com
In reply to this post by dup90011
ES runs on RHEL/Centos 6.

What exact  RHEL/Centos 6 is this? Find out with command

cat /etc/redhat-release 

What Java JVM do you use?

What file system do you have ES installed on? It must have permission to execute binaries.

Also you can run this little Java program to find the reason:

Save this as file with name LoadNativeC.java

import com.sun.jna.Native;
public class LoadNativeC {
 public static void main(String[] argv) {
   try {
     Native.register("c");
   } catch (Throwable t) {
     t.printStackTrace();
   }
 }  
}

Then compile and run with

javac -classpath $ES_HOME/lib/jna-4.1.0.jar LoadNativeC.java
java -classpath $ES_HOME/lib/jna-4.1.0.jar:. LoadNativeC

Jörg



On Thu, Jun 26, 2014 at 12:28 AM, dup90011 <[hidden email]> wrote:


Centos 6(64)

Tried to start elasticsearch with mlockall. Started, but mlockall : false

Log file message:

[2014 ...,144][WARN ][common.jna] unable to link C library. native methods
(mlockall) will be disabled.

File jna-4.1.0.jar here: /usr/share/elasticsearch/lib/jna-4.1.0.jar

Any help?




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