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java.lang.NullPointerException: 	at org.apache.lucene.store.jdbc.support.JdbcTable.setName(JdbcTable.java:183)	at org.apache.lucene.store.jdbc.support.JdbcTable.(JdbcTable.java:75)	at org.apache.lucene.store.jdbc.support.JdbcTable.(JdbcTable.java:69)	at org.apache.lucene.store.jdbc.JdbcDirectory.(JdbcDirectory.java:121)	at com.liferay.portal.search.lucene.IndexAccessorImpl._getLuceneDirJdbc(IndexAccessorImpl.java:318)	at com.liferay.portal.search.lucene.IndexAccessorImpl.getLuceneDir(IndexAccessorImpl.java:161)	at com.liferay.portal.search.lucene.IndexAccessorImpl._checkLuceneDir(IndexAccessorImpl.java:188)	at com.liferay.portal.search.lucene.IndexAccessorImpl.(IndexAccessorImpl.java:77)	at com.liferay.portal.search.lucene.LuceneHelperImpl._getIndexAccessor(LuceneHelperImpl.java:287)	at com.liferay.portal.search.lucene.LuceneHelperImpl.deleteDocuments(LuceneHelperImpl.java:168)	at com.liferay.portal.search.lucene.LuceneHelperUtil.deleteDocuments(LuceneHelperUtil.java:165)	at com.liferay.portal.search.lucene.LuceneIndexWriterImpl.deletePortletDocuments(LuceneIndexWriterImpl.java:85)	at com.liferay.portal.kernel.search.messaging.SearchWriterMessageListener.doReceive(SearchWriterMessageListener.java:75)	at com.liferay.portal.kernel.search.messaging.SearchWriterMessageListener.receive(SearchWriterMessageListener.java:41)	at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:73)	at com.liferay.portal.kernel.messaging.ParallelDestination$1.run(ParallelDestination.java:68)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)	at java.lang.Thread.run(Thread.java:595)