java.lang.NullPointerException

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    java.lang.RuntimeException: Unable to resume activity {com.ourThesis.junieNegentien2015/com.ourThesis.junieNegentien2015.MainActivity}: java.lang.NullPointerException
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.lucene.store.jdbc.support.JdbcTable.setName()
    2. Compass
      JdbcDirectory.<init>
      1. org.apache.lucene.store.jdbc.support.JdbcTable.setName(JdbcTable.java:183)
      2. org.apache.lucene.store.jdbc.support.JdbcTable.<init>(JdbcTable.java:75)
      3. org.apache.lucene.store.jdbc.support.JdbcTable.<init>(JdbcTable.java:69)
      4. org.apache.lucene.store.jdbc.JdbcDirectory.<init>(JdbcDirectory.java:121)
      4 frames
    3. Liferay Portal Impl
      LuceneIndexWriterImpl.deletePortletDocuments
      1. com.liferay.portal.search.lucene.IndexAccessorImpl._getLuceneDirJdbc(IndexAccessorImpl.java:318)
      2. com.liferay.portal.search.lucene.IndexAccessorImpl.getLuceneDir(IndexAccessorImpl.java:161)
      3. com.liferay.portal.search.lucene.IndexAccessorImpl._checkLuceneDir(IndexAccessorImpl.java:188)
      4. com.liferay.portal.search.lucene.IndexAccessorImpl.<init>(IndexAccessorImpl.java:77)
      5. com.liferay.portal.search.lucene.LuceneHelperImpl._getIndexAccessor(LuceneHelperImpl.java:287)
      6. com.liferay.portal.search.lucene.LuceneHelperImpl.deleteDocuments(LuceneHelperImpl.java:168)
      7. com.liferay.portal.search.lucene.LuceneHelperUtil.deleteDocuments(LuceneHelperUtil.java:165)
      8. com.liferay.portal.search.lucene.LuceneIndexWriterImpl.deletePortletDocuments(LuceneIndexWriterImpl.java:85)
      8 frames
    4. Liferay Portal Service
      ParallelDestination$1.run
      1. com.liferay.portal.kernel.search.messaging.SearchWriterMessageListener.doReceive(SearchWriterMessageListener.java:75)
      2. com.liferay.portal.kernel.search.messaging.SearchWriterMessageListener.receive(SearchWriterMessageListener.java:41)
      3. com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:73)
      4. com.liferay.portal.kernel.messaging.ParallelDestination$1.run(ParallelDestination.java:68)
      4 frames
    5. Java RT
      Thread.run
      1. java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
      3. java.lang.Thread.run(Thread.java:595)
      3 frames