javax.naming.NamingException

I imported 2 ldif files (schema, data) into apacheDS 1.5.3 and everything work as per excepted, however when i shutdown server and launch it the second time i get a javax.naming.NamingException. When I repeat this using apacheDS 1.5.1 everything is well.

Here's the error exception stack trace

Exception in thread "main" javax.naming.NamingException [Root exception is java.io.UTFDataFormatException]
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmTable.getRaw(JdbmTable.java:1371)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmTable.get(JdbmTable.java:314)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmMasterTable.get(JdbmMasterTable.java:139)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmStore.lookup(JdbmStore.java:1115)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmStore.getSuffixEntry(JdbmStore.java:1202)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmStore.initSuffixEntry3(JdbmStore.java:445)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmStore.init(JdbmStore.java:335)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmPartition.init(JdbmPartition.java:243)
at org.apache.directory.server.core.partition.DefaultPartitionNexus.addContextPartition(DefaultPartitionNexus.java:647)
at org.apache.directory.server.core.partition.DefaultPartitionNexus.init(DefaultPartitionNexus.java:318)
at org.apache.directory.server.core.DefaultDirectoryService.initialize(DefaultDirectoryService.java:1402)
at org.apache.directory.server.core.DefaultDirectoryService.startup(DefaultDirectoryService.java:775)
at org.apache.directory.server.configuration.ApacheDS.startup(ApacheDS.java:130)
at org.apache.directory.server.Service.init(Service.java:86)
at org.apache.directory.server.UberjarMain.main(UberjarMain.java:56)
Caused by: java.io.UTFDataFormatException
at java.io.ObjectInputStream$BlockDataInputStream.readUTFSpan(ObjectInputStream.java:3074)
at java.io.ObjectInputStream$BlockDataInputStream.readUTFBody(ObjectInputStream.java:3007)
at java.io.ObjectInputStream$BlockDataInputStream.readUTF(ObjectInputStream.java:2820)
at java.io.ObjectInputStream.readUTF(ObjectInputStream.java:1051)
at org.apache.directory.server.core.entry.ServerEntrySerializer.deserialize(ServerEntrySerializer.java:347)
at jdbm.btree.BPage.deserialize(BPage.java:1000)
at jdbm.recman.BaseRecordManager.fetch(BaseRecordManager.java:341)
at jdbm.recman.CacheRecordManager.fetch(CacheRecordManager.java:263)
at jdbm.btree.BPage.loadBPage(BPage.java:826)
at jdbm.btree.BPage.childBPage(BPage.java:816)
at jdbm.btree.BPage.find(BPage.java:285)
at jdbm.btree.BTree.find(BTree.java:407)
at org.apache.directory.server.core.partition.impl.btree.jdbm.JdbmTable.getRaw(JdbmTable.java:1362)
... 14 more