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


(dup90011) #1

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?


(Antonio Augusto Santos) #2

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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(dup90011) #3

Hmmm ...

How /tmp affected link C library?

My /tmp is fine

Any elasticsearch support exists here or only for paid version?


(Antonio Augusto Santos-2) #4

Check *mlockall *section on
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/setup-configuration.html

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 register@xdbr.com 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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(Jörg Prante) #5

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 register@xdbr.com 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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(system) #6