Develop Reference

Vaadin fail to load Failed to load the widgetset

I have changed from vaadin 7.7.12 to 7.7.24, on IBM websphere 8.5; I've compiled the widgetset with vaadin plugin 7.7.24; I install the ear on IBM Was;
The compilation give me no problem and I can istall the ear correctely on IBM WAS;
But when I try to load the page a pop up tell me:
Failed to load the widgetset: /wps/TEM_COMP_STACO/themes/TEM_COMP/VAADIN/widgetsets/AppWidgetset/AppWidgetset.nocache.js?1642423338694
I've checked that on the server side there is a file called AppWidgetset.nocache.js, but for some reason it cannot be loaded on the page;
Trying more than on time, and the number at the end change 1642423338694, I cannot figure out what that number means;
I cannot change to any vaadin version greater than 7.x.x;
I cannot figure out where is the issue.
any help is appreciated.
Francesco

I've recompiled again and also I correct a mistake (I've copied the folder AppWidgetset in two path, deleted the wrong one and the message disapppered;

Cannot run Flume because of JAR conflict

I've installed Flume and Hadoop manually (I mean, not CDH) and I'm trying to run the twitter example from Cloudera.
In the apache-flume-1.5.0-SNAPSHOT-bin directory, I start the agent with the following command:
bin/flume-ng agent -c conf -f conf/twitter.conf -Dflume.root.logger=DEBUG,console -n TwitterAgent
My conf/twitter.conf file uses the logger as the sink. The conf/flume-env.sh assigns to CLASSPATH the flume-sources-1.0-SNAPSHOT.jar that contains the definition of the twitter source. The resulting output is:
(...) [ERROR org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:253)] Unable to start EventDrivenSourceRunner: { source:com.cloudera.flume.source.TwitterSource{name:Twitter,state:IDLE} } - Exception follows. java.lang.NoSuchMethodError:
twitter4j.FilterQuery.setIncludeEntities(Z)Ltwitter4j/FilterQuery;
at com.cloudera.flume.source.TwitterSource.start(TwitterSource.java:139)
The conflict results from a FilterQuery class that is defined elsewhere in the flume lib and that does not contain the setIncludeEntities method. For me, the file that contains this class is the twitter4j-stream-3.0.3.jar and I cannot exclude the file from the classpath as suggested here.

I believe this experience was quite frustrating for you, for me it was for sure. The main problem is, both the files, flume-sources-1.0-SNAPSHOT.jar and twitter4j-stream-3.0.3.jar contains the same FilterQuery.class. That is why the conflict message is generated in the log file.
I am not a Java or Big Data expert, but I can give you an alternate to this problem. Download the Twitter4j-stream-2.6.6.jar or lower version from here and replacethe twitter4j-stream-3.0.3.jar. All the 3.X.X uses this class. After replacing, everything should work fine. But you may get some heap error after downloading huge amount of tweets. Please google the solution as it was resolved in 3.X.X files.
-Edit
Also, please don't forget to download and replace all the twitter4j files in /usr/lib/flume-ng folder. Namely, twitter4j-media-support-2.2.6.jar, twitter4j-stream-2.2.6.jar and twitter4j-core-2.2.6.jar. Any mismatch related to version among these files will also create problem.

As suggested in the post a problematic file can be search-contrib-1.0.0-jar-with-dependencies.jar too.

You need to recompile flume-sources-1.0-SNAPSHOT.jar from the git:https://github.com/cloudera/cdh-twitter-example
Install Maven, then download the repository of cdh-twitter-example.
Unzip, then execute inside (as mentionned) :
$ cd flume-sources
$ mvn package
$ cd ..
This problem happened when the twitter4j version updated from 2.2.6 to 3.X, they removed the method setIncludeEntities, and the JAR is not up to date.
PS: Do not download the prebuilt version, it is still the old.

Simply rename all twitter4j-stream* jar files and rerun your flume. It will work with charm. :)

I had the same problem and at last I solved following these steps:
First I renamed all jar files in jarx: from twitter4j-stream-3.0.3.jar -> twitter4j-stream-3.0.3.jarx, ...
This solved the error, but when it tried to estabilish connection, I got error 404:
(Twitter Stream consumer-1[Establishing connection])
[INFO - Twitter4j.internal.logging.SLF4JLogger.info(SLF4JLogger.java:83)] 404:
The URI requested is invalid or the resource requested, such as a user, does not exist.)
After reading this page (https://twittercommunity.com/t/twitter-streaming-api-not-working-with-twitter4j-and-apache-flume/66612/11) finally I solved downloading a new version of twitter4j (in the page there's a link).
Probably not the best solution, but worked for me.

JPos application error

Hi I am trying to debug the jpostest application that came with Motorola Scanner SDK foe Windows.
I am using Eclipse (Juno) with Java 7 on Windows 8.
I get the following exception when I click on the 'open' button in the 'Scanner' tab of the
POSTest application.
jpos.JposException: Could not connect to service with logicalName = MotorolaScannerSNAPI: Exception.message=com.symbol.jpos.SymScannerSvc112Factory
org.eclipse.debug.core.DebugException: com.sun.jdi.ClassNotLoadedException: Type has not been loaded occurred while retrieving component type of array.
Any help would be highly appreciated.
Thanks.

It might be a bit late, but it seems that you are missing some 'jar' dependencies.
In the 'JPos Sample Application' folder of the Motorola Scanner SDK, check the 'JPosTest.bat' file, it lists all the needed dependencies (by defining some classpaths). You will also need to define the 'java.library.path' property to point to the directory containing the CSJPOS.dll (it is also done in the bat launcher).

Navigation Engine not able to process request

I get the following error in Endeca:
com.endeca.navigation.ENEException: Navigation Engine not able to process
request `http://myhost:15000/search?terms=remote&rank=0&offset=0&irversion=601`
My MDEX version is 6.3.0
The referenced jar files in my app is:
endeca_navigation.jar : Specification-IR-Version: 6.3.0 (Read from MANIFEST file)
endeca_logging.jar: Specification-Version: 6.1.2 (Read from MANIFEST file)
Even with these referenced jars, why is the request parameter still irversion=601?
I'm using java 1.5 and building my app in eclipse. At first, it was referencing older jar files (601), but i removed those completely and replaced them with the newer jar files listed above. I've rebuilt my app and I still see the parameter irversion=601. I've been trying to find out what the issue is for a few hours, but i'm having no luck.
Any ideas?

If nothing else I think that you need an N=0 parameter for you request to work.
Also if you are using an application server like Weblogic to run you app, it has a tendency of caching referenced jars which may have to be cleared for it to pick up the new versions of the jars.
Finally if all else fails there is a --back_compat 601 parameter on your dgraph which indicated the accepatble navigation.jar versions. You can use this parameter to determine if the issue is the jar version or something else in between.
Good Luck

Additionally to Wiszh's response, it is useful to take a look at the dgraph request query logs (located in /logs/dgraph/Dgraphxx/Dgraphxx.log and .reqlog) which will show a more specific error and the query that caused it.

Do your jars match the version of Endeca server you are querying?

This issue is due to an old navigation api jar in your class path
Check the ToolsAndFrameworks\version\assembler\lib to get the correct version of navigation api jar. That should fix this issue.

correct jar path fixed the issue for me
ToolsAndFrameworks\version\assembler\lib

Play in Production - Secure cannot be resolved to a type

I have developed a little program for myself. After testing and
finishing it locally I now wanted to put it on my server.
I get this error:
Compilation error The file /app/controllers/Links.java could not be
compiled. Error raised is : Secure cannot be resolved to a type
It is thrown at this line:
#With(Secure.class)
In the Class Links I have:
import play.mvc.With;
import controllers.*;
#With(Secure.class)
public class Links extends CRUD {
}
I have installed play 1.2.2 on my server. Play is running probably. I
type in the terminal "play start appname" and opened serverIp:9010 to
see this error. If I type "play precompile appname" everything seems
to work.
In the subfolder /modules of the app I have two text files, one "crud"
and one "secure" which point to the modules location on the server. I
also have defined the modules in dependencies.yml like this:
require:
- play
- crud
- secure
In the application.conf I have a Production definition for my server
with the proper Server-ID like this:
%server1.application.mode=PROD
Any idea why this isn't working?

I have solved it. For future reference:
I had an old process of play running. Found it with ps -aux and then kill PID. After that I started the application again with play start.
It's now running fine :)
Thanks for you help!

Declaring the secure module in dependencies.yml file is the first step.
Next you have to type the shell command "play dependencies" in order to resolve them.
Just have a glance on the documentation here : http://www.playframework.org/documentation/1.2.2/dependency#Theplaydependenciescommand
Have fun with Play!

Sometimes you have to refesh the classpath settings by using play eclipsify again. (depends on the IDE you are using)

I had to insert this line to application.config
module.secure=${play.path}/modules/secure

I had the same problem in my development environment, but not in my production server. I tried to solve by the module documentation, the accepted answer here, and many others with no success.
My solution was to download again play framework (1.2.7) and replacing it in the path where I installed first.
Hope this can guide someone else with the same issue.
Regards.