java.lang.OutOfMemoryError: Java heap space

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java.lang.OutOfMemoryError: Java heap space
at java.io.UnixFileSystem.list(Native Method)
at java.io.File.list(File.java:937)
at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:157)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.provider.SeedGenerator.getSystemEntropy(SeedGenerator.java:137)
at sun.security.provider.SecureRandom$SeederHolder.(SecureRandom.java:164)
at sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:183)
at java.security.SecureRandom.nextBytes(SecureRandom.java:413)
at oracle.security.o5logon.O5Logon.a(Unknown Source)
at oracle.security.o5logon.O5Logon.(Unknown Source)
at oracle.jdbc.driver.T4CTTIoauthenticate.(T4CTTIoauthenticate.java:582)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:401)
at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:553)
at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:254)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at oracle.apps.ad.util.DBUtil.getConnectionUsingSID(DBUtil.java:253)
at oracle.apps.ad.util.DBUtil.getConnection(DBUtil.java:432)
at oracle.apps.ad.util.DBUtil.getConnectionUsingAppsJDBCConnector(DBUtil.java:613)
at oracle.apps.ad.tools.configuration.FileSysDBCtxMerge.getDBConnection(FileSysDBCtxMerge.java:803)
at oracle.apps.ad.tools.configuration.FileSysDBCtxMerge.initializeParams(FileSysDBCtxMerge.java:150)
at oracle.apps.ad.tools.configuration.FileSysDBCtxMerge.setParams(FileSysDBCtxMerge.java:131)
at oracle.apps.ad.context.CtxValueMgt.mergeCustomInFiles(CtxValueMgt.java:1789)
at oracle.apps.ad.context.CtxValueMgt.processCtxFile(CtxValueMgt.java:1608)
at oracle.apps.ad.context.CtxValueMgt.main(CtxValueMgt.java:763)

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