Develop Reference

java.sql.SQLException: Problems with loading native library/missing methods: no ttJdbc181 in java.library.path

I am running TimesTen facing application in local (in eclipse IDE). URL and username and password seems to be fine. But I am getting below exception.
java.sql.SQLException: Problems with loading native library/missing methods: no ttJdbc181 in java.library.path
at com.timesten.jdbc.JdbcOdbcConnection.connect(JdbcOdbcConnection.java:2012)
at com.timesten.jdbc.TimesTenDriver.connect(TimesTenDriver.java:296)
at com.timesten.jdbc.TimesTenDriver.connect(TimesTenDriver.java:152)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:319)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:212)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:736)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:668)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:483)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getPool(DataSourceProxy.java:214)
I checked the bin folder of TimsTen installation directory did not see ttJdbc181.dll file Instead I found ttJdbcCS.181 in the folder. I don't know why code is looking for ttjdbc181.dll file. I have tried adding ttjdbc8,9,10,11 to class path still same issue. Any help to resolve this issue will be appreciated.

Had same stack trace.
All I had to do is to add "jdbc:timesten:client:" to my connection string. It is driver and protocol as far as my understanding goes.
My connection string looks like follows:
jdbc:timesten:client:TTC_Server=127.0.0.1;TTC_Server_DSN=myDsn;UID=user;PWD=userpasswd;TCP_PORT=9999;
This was issue on Windows. Assume same would arise for Linux.
Also please ensure you have correct CLASSPATH, Lib, Include, Path environment variables.
Windows installer usually takes care of this. On Linux you have to run ttenv.sh script from directory of your installed instance, this will set env vars as required.

Activiti Explorer - Request resource is not available

I have big problem to run activiti-explorer when i try access: http://localhost:8080/activiti-explorer/ tomcat shows me HTTP Status 404 - The requested resource is not available. I'm really don't have any idea why that dosen't work. Can you help me?
This what have I done on my PC:
I'm using 5.19.0 version of activiti-explorer
7.0.63 tomcat
JDK 1.8.0.77 (i think there is no point to downgrade java to previous versions (<=1.7) becouse my main application using this version)
I'm sure I have correctly configured environment variables (JAVA_HOME,JRE_HOME,PATH,CATALINA_HOME)
I configured data base connection (db.properties, context.xml) in activiti-explorer.war and i moved this file to tomcat/webapps
I don't have any errors about activiti during tomcat start

Check if activiti explorer is deployed to tomcat in manager.
http://{host}:{port}/manager/html
More info in https://tomcat.apache.org/tomcat-7.0-doc/manager-howto.html

Check the catalina.out log. There will be something in there that leads you to the solution.

Check Admin Console (cmd that runs behind) after hitting the link. most recent exception occurred will be displayed there.

HypergraphDB Netbeans settings

I want to do something with the HypergraphDB in Java. I'm not very familiar with this language and IDE Netbeans.
I followed steps describing the HGDB installation:Link to tutorial
Now I want to write an example in Java (using NetbeansIDE).
So I created new project, added refferences to the downloaded libraries. OK, now I'm able to import packages with HGDB. The only thing I have in my main method is HyperGraph HG = new HyperGraph(dbLocation);. This code compiles. But get following runtime error:
run:
checkpoint kbytes:0
checkpoint minutes:0
java.lang.IllegalStateException: There is 1 existing transaction opened against the Environment.
Aborting open transactions ...
aborting <Transaction id="28">
at com.sleepycat.je.Environment.close(Environment.java:383)
at org.hypergraphdb.storage.bje.BJEStorageImplementation.shutdown(BJEStorageImplementation.java:178)
at org.hypergraphdb.HGStore.close(HGStore.java:355)
at org.hypergraphdb.HyperGraph.open(HyperGraph.java:392)
at org.hypergraphdb.HyperGraph.open(HyperGraph.java:213)
at org.hypergraphdb.HyperGraph.<init>(HyperGraph.java:200)
at hgdbtest.HgdbTest.main(HgdbTest.java:16)
Exception in thread "main" org.hypergraphdb.HGException: java.lang.NoSuchMethodError: org.hypergraphdb.storage.bje.LinkBinding.objectToEntry(Ljava/lang/Object;Lcom/sleepycat/je/DatabaseEntry;)V
at org.hypergraphdb.HyperGraph.open(HyperGraph.java:395)
at org.hypergraphdb.HyperGraph.open(HyperGraph.java:213)
at org.hypergraphdb.HyperGraph.<init>(HyperGraph.java:200)
at hgdbtest.HgdbTest.main(HgdbTest.java:16)
Caused by: java.lang.NoSuchMethodError: org.hypergraphdb.storage.bje.LinkBinding.objectToEntry(Ljava/lang/Object;Lcom/sleepycat/je/DatabaseEntry;)V
at org.hypergraphdb.storage.bje.BJEStorageImplementation.store(BJEStorageImplementation.java:234)
at org.hypergraphdb.HGStore.store(HGStore.java:119)
at org.hypergraphdb.HGTypeSystem.addPrimitiveTypeToStore(HGTypeSystem.java:185)
at org.hypergraphdb.HGTypeSystem.bootstrap(HGTypeSystem.java:234)
at org.hypergraphdb.HyperGraph.open(HyperGraph.java:355)
... 3 more
Java Result: 1
BUILD SUCCESSFUL (total time: 4 seconds)
I guess it's caused by the native API of the BerkeleyDB.
According to the tutorial, in project options I supply the -Djava.library.path=$HGDB_ROOT/lib/native/$PLATFORM argument on Run card as a VM Option. Instead of the system variables I use full-path to the libraries.
My OS in Windows7. I'm not sure about using slashes or backslashes or double-backslashes as a path-separator.?
So a simply question is: how have I to set up the IDE for using the HypergraphDB?
Thank you for advices!

Judging from the stack trace, you are using the latest version of HyperGraphDB. In that version, the native API is not used. Rather, it's Java only libraries. You have to include the BerkeleyDB Java Edition 5.0.34 jar in your runtime classpath. You can get it either from the Oracle http://www.oracle.com/technetwork/products/berkeleydb/downloads/index.html or from the HyperGraphDB Maven repository: http://hypergraphdb.org/maven/org/hypergraphdb/hgbdbje/1.2/hgbdbje-1.2.jar

I had the same issue. I fixed it (by accident) by fixing the order of the libraries on which you're HyperGraphDB application relies on. The library je-[version].jar has to be ABOVE (and hence to be referenced before) db-[version].jar

RMI Registry Issue: rmiregistry may cause unintended exceptions when binding with codebase using the "file:" URL scheme

Please see the passage "RMI Registry Issue" of this article for the background on Java Update 1.6.0_29 first.
If I understand correctly (I'm german), the update introduces a bug in the rmiregistry which fails to work with the file: pattern in the codebase.
I.E. the following won't work any more with 1.6.0_29:
-Djava.rmi.server.codebase="file:myproject/bin/ ..."
We are currently using the feature of having a codebase with file: syntax. Does anyone know a workaround for making this work?
Note: No, we do not want to start a local webserver or ftp server.
Update:
On Naming.bind this exception is thrown:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: access to class loader denied
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:400)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:248)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)

I had the same problem, and can confirm that downgrading JDK to earlier version solves the problem. I know, it's not a solution you're looking for, but at least it makes it to work.

Take running in windows as an example:
Step 1. In C:\Users\Jimmy.java.policy (create it if not exist), append below content:
grant { permission java.security.AllPermission; };
Of course "C:\Users\Jimmy\" is the user home, please change to your home accordingly.
Adding AllPermission is just for quick resolving your issue. you'd better config a more accurate FilePermission here.
Step 2. Start rmiregistry:
C:\JDK\bin>rmiregistry -J-Djava.rmi.server.codebase=file://C:/workspaces/MyLab/target/classes/
(Please note codebase must ended with "/")
Step 3. Run your server and client program.
References:
http://docs.oracle.com/javase/7/docs/technotes/guides/rmi/codebase.html
http://docs.oracle.com/javase/7/docs/technotes/guides/security/spec/security-spec.doc3.html
http://docs.oracle.com/javase/7/docs/technotes/guides/rmi/enhancements-7.html

It looks like there is no workaround because it is a bug, so wait for the fix
See details at
https://bugzilla.redhat.com/show_bug.cgi?id=751203
Code fix
http://icedtea.classpath.org/hg/icedtea6/rev/67df573b0734

If you do not need dynamic code downloading (in which case you can use ftp codebase) the solution is simply to set CLASSPATH environment variable to the path to your jar file:
Windows:
set CLASSPATH="path_to_jarfile"
Linux (batch):
CLASSPATH="path_to_jarfile"
export CLASSPATH
Best place to do it is in some script that invokes the RMI server.
Setting class path in the command line (-cp option) when starting RMI server does not help because it does not affect rmiregistry classpath!

If you start the rmiregistry in the working directory of your project, it works.
So essentially working directory of your project and current directory for rmiregistry should be same.

I recently encountered this issue as well. I can confirm that when using the file: protocol the rmiregistry must either:
be started in the root of the directory containing the shared classes; or
set the classpath to point to the shared classes or shared class jar; or
use a protocol other than file:// (I set up ngnix and served the jar from that).

Maybe not what you want, but you could resolve this with classpath rather than codebase. The client JVM will work fine if you add the required classes to its classpath. If you are using the file: URL scheme, then the classes must already be available on the localhost.

I had the same problem but I couldn't change the JDK version. Turns out you can solve it by running/starting the rmiregistry from the same directory as your code base, which in my case was target/classes. So cd project/target/classes and then run rmiregistry &

Hibernate fails with NullPointerException in EntityTuplizerFactory.constructTuplizer? Why?

I have a problem when I try to instantiate Hibernate and connect with a MySQL database (see error message below).
Curiously enough the connection works fine using the exact same hibernate.cfg.xml file when running Junit tests but it refuses to work when run from Tomcat...
I am starting to run out of ideas.
Any clues or tip where to look?
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.DynamicMapEntityTuplizer]
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:110)
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:135)
at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.(EntityEntityModeToTuplizerMapping.java:69)
at org.hibernate.tuple.entity.EntityMetamodel.(EntityMetamodel.java:323)
at org.hibernate.persister.entity.AbstractEntityPersister.(AbstractEntityPersister.java:456)
at org.hibernate.persister.entity.SingleTableEntityPersister.(SingleTableEntityPersister.java:131)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:267)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1341)
at se.fmt.atlantism.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:16)
... 38 more
Caused by: java.lang.NullPointerException
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:107)
... 47 more

I'm writing this for future Googlers and reference.
I've done some more research and the root source of the problem is still not known. However the following article throw me on the right track.
http://www.howtogeek.com/howto/linux/installing-tomcat-6-on-ubuntu/
It seems like the Tomcat (version 6 at least) packages available in Ubuntu (and Debian) are not working correctly. Instead I installed Tomcat using the following guide:
http://www.ctrip.ufl.edu/tomcat6-debian-lenny-howto
While this might not be the premium choice of installation it seems necessary to get Tomcat version 6 running without problems on Ubuntu and/or Debian Lenny.

In my case, this error was resolved by switching the <dependency/> order in my pom.xml. When hibernate (3.2.7.ga) comes before hibernate-annotations (3.4.0.GA) this error occurs. The other way around, it works fine. This is the case even with scope=compile.
I would guess that you need to tweak your classpath, except that (assuming you've dropped both jars in WEB-INF/lib) it should alpha-sort in the correct order. But maybe this will give someone a hint on how to move forward.

In my case it was a simple mistake - the config file *.hbm.xml had a property that the mapped object didnt have! I also heard of cases of that error apearing when you misspell a get/set function - very similar to my case.

I was facing the same problem. It went away after I downloaded "javassist.jar" and put it in the classpath: http://www.java2s.com/Code/Jar/JKL/Downloadjavassistjar.htm

This is how the Tomcat daemon process looks:
root 2605 0.0 0.0 16584 376 ? Ss 15:39 0:00
/usr/bin/jsvc -user tomcat6
-cp /usr/share/java/commons-daemon.jar:/usr/share/tomcat6/bin/bootstrap.jar
-outfile SYSLOG -errfile SYSLOG -pidfile /var/run/tomcat6.pid
-Djava.awt.headless=true -Xmx128M
-Djava.endorsed.dirs=/usr/share/tomcat6/endorsed
-Dcatalina.base=/var/lib/tomcat6 -Dcatalina.home=/usr/share/tomcat6
-Djava.io.tmpdir=/tmp/tomcat6-temp -Djava.security.manager
-Djava.security.policy=/var/lib/tomcat6/work/catalina.policy
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-Djava.util.logging.config.file=/var/lib/tomcat6/conf/logging.properties
org.apache.catalina.startup.Bootstrap
This is how the Tomcat process looks when run from within Eclipse using the Sysdeo Tomcat launcher plugin:
(this one actually works)
jzaruba 2655 19.7 4.5 358304 46152 ? Sl 15:43 0:01
/usr/lib/jvm/java-6-sun-1.6.0.15/bin/java
-agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:37377
-Dcatalina.home=/usr/share/tomcat6
-Djava.endorsed.dirs=/usr/share/tomcat6/endorsed
-Dcatalina.base=/var/lib/tomcat6 -Djava.io.tmpdir=/var/lib/tomcat6/temp
-Dfile.encoding=UTF-8 -classpath
/usr/share/tomcat6/bin/bootstrap.jar:/usr/lib/jvm/java-6-sun-1.6.0.15/lib/tools.jar
org.apache.catalina.startup.Bootstrap start
The working one (Eclipse launched) is run using java-6-sun-1.6.0.15, I'm Windows user so I don't know how to tell which JRE is used for /usr/lib/jsvc (looking at it though), but my guess would be it is some OpenJDK... Could this be the difference?
update: jsvc probably uses the same JRE Sysdeo Tomcat launcher does