eclipse - mongoDB: java.lang.IncompatibleClassChangeError: Implementing class -


i trying write little test-programm different databases. mongodb 1 of them , worked fine until last friday, though didn't change in java code of mongodb class.

system: use ubuntu 14.04 vm package mongo-org. version of mongo 3.0.5.

i run mariadb, postgresql , cassandra on vm. client, have windows 7 , eclipse.

the connection , test work fine other 3 databases.

and can run "mongo" client on ubuntu well.

but when try out java test of mongodb, keep getting error:

exception in thread "main" java.lang.incompatibleclasschangeerror: implementing class     @ java.lang.classloader.defineclass1(native method)     @ java.lang.classloader.defineclass(unknown source)     @ java.security.secureclassloader.defineclass(unknown source)     @ java.net.urlclassloader.defineclass(unknown source)     @ java.net.urlclassloader.access$100(unknown source)     @ java.net.urlclassloader$1.run(unknown source)     @ java.net.urlclassloader$1.run(unknown source)     @ java.security.accesscontroller.doprivileged(native method)     @ java.net.urlclassloader.findclass(unknown source)     @ java.lang.classloader.loadclass(unknown source)     @ sun.misc.launcher$appclassloader.loadclass(unknown source)     @ java.lang.classloader.loadclass(unknown source)     @ java.lang.classloader.defineclass1(native method)     @ java.lang.classloader.defineclass(unknown source)     @ java.security.secureclassloader.defineclass(unknown source)     @ java.net.urlclassloader.defineclass(unknown source)     @ java.net.urlclassloader.access$100(unknown source)     @ java.net.urlclassloader$1.run(unknown source)     @ java.net.urlclassloader$1.run(unknown source)     @ java.security.accesscontroller.doprivileged(native method)     @ java.net.urlclassloader.findclass(unknown source)     @ java.lang.classloader.loadclass(unknown source)     @ sun.misc.launcher$appclassloader.loadclass(unknown source)     @ java.lang.classloader.loadclass(unknown source)     @ com.mongodb.mongoclientoptions$builder.<init>(mongoclientoptions.java:52)     @ com.mongodb.mongoclient.<init>(mongoclient.java:126)     @ com.mongodb.mongoclient.<init>(mongoclient.java:115)     @ de.motza.database.impl.databaseimplmongodb.connect(databaseimplmongodb.java:197)     @ de.motza.database.impl.databaseimplmongodb.instantiate(databaseimplmongodb.java:207)     @ de.motza.test.history_log.testnewdatabase(history_log.java:86)     @ de.motza.test.history_log.main(history_log.java:66)

the part of java class, exception occurs:

private static string dbhost = "10.158.251.251"; private static int dbport = 27017; private static string dbname = "history_log"; private static mongoclient mongoclient = null; [...] @override     public void connect() {         try {             mongoclient = new mongoclient(dbhost, dbport);             db = mongoclient.getdb(dbname);         } catch (exception e) {             log.error(e);         }      }

i read disk-space, habe 12 gb free in vm, not think problem. ran apt-get upgrade, didn't change either. reinstalled mongodb, nothing changed. tried recompile, nothing changed there either.

does have advice?

addition:

here find library tab of project. use multiple databases, marked ones important mongodb the library tab of project

one possible reason incompatibleclasschangeerror mongo library binary has changed (for whatever reason) , earlier compiled test code isn't more compatible library. suggest recompile test code , try again.


-

Comments

Post a Comment

Popular posts from this blog

java - UnknownEntityTypeException: Unable to locate persister (Hibernate 5.0) -

Image
in code below when try execute main.java getting exception: exception in thread "main" org.hibernate.unknownentitytypeexception: unable locate persister: com.np.vta.test.pojo.users @ org.hibernate.internal.sessionfactoryimpl.locateentitypersister(sessionfactoryimpl.java:792) @ org.hibernate.internal.sessionimpl.locateentitypersister(sessionimpl.java:2637) @ org.hibernate.internal.sessionimpl.access$2500(sessionimpl.java:164) @ org.hibernate.internal.sessionimpl$identifierloadaccessimpl.<init>(sessionimpl.java:2575) @ org.hibernate.internal.sessionimpl$identifierloadaccessimpl.<init>(sessionimpl.java:2562) @ org.hibernate.internal.sessionimpl.byid(sessionimpl.java:1044) @ org.hibernate.internal.sessionimpl.get(sessionimpl.java:955) @ com.app.test.main.main(main.java:20) but if uncomment cfg.addclass( users.class ).addresource( "com/np/vta/test/pojo/users.hbm.xml" ); code works fine. why not reading <mapping...
Read more

python - ValueError: empty vocabulary; perhaps the documents only contain stop words -

i'm using (for first time) scikit library , got error: valueerror: empty vocabulary; perhaps documents contain stop words file "c:\users\a605563\desktop\velibprojetpreso\traitementtwitterdico.py", line 33, in <module> x_train_counts = count_vect.fit_transform(filetweets) file "c:\python27\lib\site-packages\sklearn\feature_extraction\text.py", line 804, in fit_transform self.fixed_vocabulary_) file "c:\python27\lib\site-packages\sklearn\feature_extraction\text.py", line 751, in _count_vocab raise valueerror("empty vocabulary; perhaps documents contain stop words but don't understand why that's happening. import sklearn sklearn.feature_extraction.text import countvectorizer import pandas pd import numpy import unicodedata import nltk tweetsfile = open('tweets2015-08-13.csv', 'r+') f2 = open('analyzer.txt', 'a') print tweetsfile.readline() count_vect = countvectorizer(strip_accents='ascii...
Read more

ubuntu - collect2: fatal error: ld terminated with signal 9 [Killed] -

Image
i'm trying build precimonious on ubuntu 16.04.3 x64. allocated 1gb memory it. file structure looks like ~ |--- llvm/ |--- precimonious/ where llvm on version 3.0 mentioned @ https://github.com/corvette-berkeley/precimonious#requirement . followed steps on readme command make ended with ... llvm[1]: linking debug shared library libllvm-3.0.so collect2: fatal error: ld terminated signal 9 [killed] compilation terminated. ... i went through answers online , might because there's not enough memory perform link. memory usage the gcc version on machine gcc version 5.4.0 20160609 (ubuntu 5.4.0-6ubuntu1~16.04.4) , installed via apt-get install build-essential . fresh droplet created on digitalocean btw. appreciated. it memory exhaustion. sampling interval memory measurement not small enough covers exact point oom killer kicks in. depending on container/vm technology, may able set vm.overcommit_memory=2 before build, process not killed (but doing requires m...
Read more