ContextFactory slow on Linux

The below section of code is running extremely slow on our Linux virtual machines (both ours and our clients). Particularly the first two lines creating the context factory. It has been taking 5-10 seconds or more for getting the instance and creating the new context and this is being done by multiple portlets in our application. When we run the exactly same application locally on our mac's hitting the same documentum server on the same network it takes milliseconds. Connectivity between all the machines doesn't seem to be an issue. After the initial connection the performance seems fine.

Any idea's why it would run so slowly on Linux.

CentOS 5.5 and Redhat EL6

Documentum 6.6

Oracle 11gr2

ContextFactory contextFactory = ContextFactory.getInstance();

serviceContext = contextFactory.newContext();

RepositoryIdentity repoId = new RepositoryIdentity();

repoId.setRepositoryName(defaultRepositoryName);

repoId.setUserName(userName);

repoId.setPassword(password);

serviceContext.addIdentity(repoId);

ContentTransferProfile contentTransferProfile = new ContentTransferProfile();

contentTransferProfile.setTransferMode(ContentTransferMode.MTOM);

contentTransferProfile.setGeolocation("Pleasanton");

serviceContext.setProfile(contentTransferProfile);

PropertyProfile propertyProfile = new PropertyProfile();

propertyProfile.setFilterMode(PropertyFilterMode.ALL_NON_SYSTEM);

serviceContext.setProfile(propertyProfile);

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Comments

Wiesnoepersad

Can you add the next

DEVRANDOM=/dev/urandom

export DEVRANDOM

in $DM_HOME/bin/dm_set_server_env.sh and restart the docbase?

MartyPhee

We have already done that on the documentum server and it didn't make a difference during startup on the app server.

Would I need this on the app server?

Wiesnoepersad

The performance issues with SecureRandom on some Linux environments is a known issue.

http://stackoverflow.com/questions/137212/how-to-solve-performance-problem-with-java-securerandom

. Edit the file java.security on this location on the method server: $DOCUMENTUM/share/jboss4.2.0/jdk/jre/lib/security/ and make this change:

Replace:

“securerandom.source=file:/dev/urandom”

“securerandom.source=file:/dev/./urandom”

MartyPhee

It was already set that way.

Still very slow startups. I'm seeing this at the client site also, just not as bad since their app servers are faster machines.

MartyPhee

I fixed the issue.

Thank you for the lead. I wouldn't have found it otherwise. Seems there's a bug in java >=5.

You need to use this instead:

-Djava.security.egd=file:/dev/./urandom

I'm on development servers so I haven't checked the effectiveness of the random numbers, but my app when for 300-500+ secs to startup down to 58, which is as fast as my macbook pro.

Another suggestion for development was to point it to /dev/null.