java.sql.SQLNonTransientConnectionException: A network protocol error was encountered and the connection has been terminated: the requested command encountered an unarchitected and implementation-specific condition for which there was no architected message (additional information may be available in the derby.log file on the server)

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java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect.
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java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect.
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java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect.
org.apache.derby.client.am.DisconnectException: A network protocol error was encountered and the connection has been terminated: the requested command encountered an unarchitected and implementation-specific condition for which there was no architected message (additional information may be available in the derby.log file on the server)
at org.apache.derby.client.net.NetConnectionReply.parseCMDCHKRM(NetConnectionReply.java:882)
at org.apache.derby.client.net.NetStatementReply.parsePrepareError(NetStatementReply.java:550)
at org.apache.derby.client.net.NetStatementReply.parsePRPSQLSTTreply(NetStatementReply.java:144)
at org.apache.derby.client.net.NetStatementReply.readPrepareDescribeOutput(NetStatementReply.java:53)
at org.apache.derby.client.net.StatementReply.readPrepareDescribeOutput(StatementReply.java:40)
at org.apache.derby.client.net.NetStatement.readPrepareDescribeOutput_(NetStatement.java:138)
at org.apache.derby.client.am.Statement.readPrepareDescribeOutput(Statement.java:1443)
at org.apache.derby.client.am.Statement.flowExecute(Statement.java:2117)
at org.apache.derby.client.am.Statement.executeQueryX(Statement.java:492)
at org.apache.derby.client.am.Statement.executeQuery(Statement.java:477)
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:71)
at org.apache.derby.client.am.SqlException.getSQLException(SqlException.java:358)
at org.apache.derbyTesting.functionTests.tests.store.Foo.testShutdown(Foo.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:112)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)

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