[jira] [Created] (IOTDB-131) IoTDB-Grafana module error when getting the timeseries list from Grafana

["xiangdong Huang (JIRA)" <ji...@apache.org>]

xiangdong Huang created IOTDB-131:
-------------------------------------

             Summary: IoTDB-Grafana module error when getting the timeseries list from Grafana
                 Key: IOTDB-131
                 URL: https://issues.apache.org/jira/browse/IOTDB-131
             Project: Apache IoTDB
          Issue Type: Bug
            Reporter: xiangdong Huang


Hi, 

when I installed the Grafana, installed the grafana-simple-json plugin, and tried to use iotdb-grafana to show data from IoTDB using Grafana. The IoTDB-grafana module printed errors:

 

```


java.lang.NullPointerException: null
 at org.apache.iotdb.jdbc.IoTDBDatabaseMetadata.getColumnsFunc(IoTDBDatabaseMetadata.java:79) ~[classes/:na]
 at org.apache.iotdb.jdbc.IoTDBDatabaseMetadata.getColumns(IoTDBDatabaseMetadata.java:53) ~[classes/:na]
 at org.apache.iotdb.web.grafana.dao.impl.BasicDaoImpl$1.doInConnection(BasicDaoImpl.java:59) ~[classes/:na]
 at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:353) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.apache.iotdb.web.grafana.dao.impl.BasicDaoImpl.getMetaData(BasicDaoImpl.java:69) ~[classes/:na]
 at org.apache.iotdb.web.grafana.dao.impl.BasicDaoImpl$$FastClassBySpringCGLIB$$c48003da.invoke(<generated>) ~[classes/:na]
 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
 at org.apache.iotdb.web.grafana.dao.impl.BasicDaoImpl$$EnhancerBySpringCGLIB$$9869800c.getMetaData(<generated>) ~[classes/:na]

```



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