Hi,
I am trying to create a dataset from 748KB sized data file [1] and getting
following error.
[2015-10-02 01:03:38,769] INFO
{org.wso2.carbon.ml.core.impl.MLDatasetProcessor} - [Created] MLDataset
[id=1, name=digitdd, tenantId=-1234, userName=admin, dataSourceType=file,
dataTargetType=file, sourcePath=null, dataType=csv, comments=,
version=1.0.0, containsHeader=true, status=null]
[2015-10-02 01:03:40,537] WARN
{org.wso2.carbon.ml.database.internal.MLDatabaseUtils} - An error occurred
while enabling autocommit: PooledConnection has already been closed.
java.sql.SQLException: PooledConnection has already been closed.
at
org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:86)
at com.sun.proxy.$Proxy16.setAutoCommit(Unknown Source)
at
org.wso2.carbon.ml.database.internal.MLDatabaseUtils.enableAutoCommit(MLDatabaseUtils.java:153)
at
org.wso2.carbon.ml.database.internal.MLDatabaseService.updateSummaryStatistics(MLDatabaseService.java:2370)
at
org.wso2.carbon.ml.core.impl.SummaryStatsGenerator.run(SummaryStatsGenerator.java:130)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
[2015-10-02 01:03:40,550] ERROR
{org.wso2.carbon.ml.core.impl.SummaryStatsGenerator} - Error occurred
while calculating summary statistics for dataset version 1: An error
occurred while updating the database with summary statistics of the dataset
1: 16
org.wso2.carbon.ml.database.exceptions.DatabaseHandlerException: An error
occurred while updating the database with summary statistics of the dataset
1: 16
at
org.wso2.carbon.ml.database.internal.MLDatabaseService.updateSummaryStatistics(MLDatabaseService.java:2366)
at
org.wso2.carbon.ml.core.impl.SummaryStatsGenerator.run(SummaryStatsGenerator.java:130)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 16
at
org.wso2.carbon.ml.database.internal.MLDatabaseService.updateSummaryStatistics(MLDatabaseService.java:2329)
... 4 more
What could be the possible reason for this error ?
[1]
http://ocw.mit.edu/courses/sloan-school-of-management/15-097-prediction-machine-learning-and-statistics-spring-2012/datasets/digits.csv
Regards,
Malintha
--
*Malintha Adikari*
Software Engineer
WSO2 Inc.; http://wso2.com
lean.enterprise.middleware
Mobile: +94 71 2312958
Blog: http://malinthas.blogspot.com
Page: http://about.me/malintha
_______________________________________________
Dev mailing list
Dev@wso2.org
http://wso2.org/cgi-bin/mailman/listinfo/dev
