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From "Emmanuel Lecharny (JIRA)" <directory-...@incubator.apache.org>
Subject [jira] Created: (DIRLDAP-30) Digester throw an EmptyStackException even if result is OK
Date Mon, 31 Jan 2005 23:59:17 GMT
Digester throw an EmptyStackException even if result is OK
----------------------------------------------------------

         Key: DIRLDAP-30
         URL: http://issues.apache.org/jira/browse/DIRLDAP-30
     Project: Directory LDAP
        Type: Bug
  Components: Snickers Codec Provider  
 Environment: Not relevant
    Reporter: Emmanuel Lecharny
 Assigned to: Alex Karasulu 
    Priority: Blocker


Binding to the Ldap database (OpenLdap), I get a correct answer :  
30 0c --> Bind Result, 12 bytes long
02 01 01 --> Message ID = 1
61 07 --> Bind Result, length = 7
0a 01 00 --> Result code = Success
04 00 --> no matched DN
04 00 --> no error message

But I got a full pack of stack trace from Digester. It seems that if the stack is empty, it
does not work. Does Digester able to handle zero length value TLV ? (here, the last two TLV
are TL = {04 00} and TL = {04 00}, as they have L=0, so V does not exist).

Here is the trace and the stack.

(Man, digester is a maze !)


0 [main] DEBUG org.apache.ldap.common.berlib.asn1.SnickersDecoder  - Read 14 bytes :
2 [main] DEBUG org.apache.ldap.common.berlib.asn1.SnickersDecoder  - [30 0c 02 01 01 61 07
0a 01 00 04 00 04 00]
3 [main] DEBUG BERDigester  - Rule org.apache.asn1.ber.digester.rules.PrimitiveIntDecodeRule@10f11b8
fired successfully by digester org.apache.asn1.ber.digester.BERDigester@544ec1
33 [main] DEBUG BERDigester  - Rule org.apache.ldap.common.berlib.asn1.decoder.ResultMatchedDNRule@cfec48
fired successfully by digester org.apache.asn1.ber.digester.BERDigester@544ec1
34 [main] DEBUG BERDigester  - Rule org.apache.ldap.common.berlib.asn1.decoder.ErrorMessageRule@a17083
fired successfully by digester org.apache.asn1.ber.digester.BERDigester@544ec1
34 [main] DEBUG BERDigester  - Rule org.apache.ldap.common.berlib.asn1.decoder.ResultMatchedDNRule@cfec48
fired successfully by digester org.apache.asn1.ber.digester.BERDigester@544ec1
34 [main] DEBUG BERDigester  - Rule org.apache.ldap.common.berlib.asn1.decoder.ErrorMessageRule@a17083
fired successfully by digester org.apache.asn1.ber.digester.BERDigester@544ec1

36 [main] ERROR BERDigester  - Error while triggering rule 

org.apache.ldap.common.berlib.asn1.decoder.bind.BindResponseRule@e1d5ea with digester 

org.apache.asn1.ber.digester.BERDigester@544ec1: Rule.finish() threw exception

java.util.EmptyStackException
	at org.apache.commons.collections.ArrayStack.peek(ArrayStack.java:89)
	at org.apache.asn1.ber.digester.BERDigester.peek(BERDigester.java:279)
	at org.apache.ldap.common.berlib.asn1.decoder.bind.BindResponseRule.finish(BindResponseRule.java:58)
	at org.apache.asn1.ber.digester.BERDigester.fireFinishEvent(BERDigester.java:1132)
	at org.apache.asn1.ber.digester.BERDigester$DigesterCallback.decodeOccurred(BERDigester.java:196)
	at org.apache.asn1.ber.BERDecoder.fireDecodeOccurred(BERDecoder.java:355)
	at org.apache.asn1.ber.BERDecoder.updateStack(BERDecoder.java:404)
	at org.apache.asn1.ber.BERDecoder.decodeOccurred(BERDecoder.java:279)
	at org.apache.asn1.codec.stateful.AbstractStatefulDecoder.decodeOccurred(AbstractStatefulDecoder.java:119)
	at org.apache.asn1.ber.LengthDecoder.decode(LengthDecoder.java:53)
	at org.apache.asn1.ber.BERDecoder.decode(BERDecoder.java:152)
	at org.apache.asn1.ber.digester.BERDigester.decode(BERDigester.java:141)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.digest(SnickersDecoder.java:179)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.decode(SnickersDecoder.java:125)
	at org.apache.ldap.common.message.MessageDecoder.decode(MessageDecoder.java:106)
	at org.apache.ldap.clients.LdapBind.bind(LdapBind.java:342)
	at org.apache.ldap.clients.LdapBind.main(LdapBind.java:401)
36 [main] ERROR BERDigester  - Error while triggering rule org.apache.ldap.common.berlib.asn1.decoder.bind.BindResponseRule@e1d5ea
with digester org.apache.asn1.ber.digester.BERDigester@544ec1: Rule.finish() threw exception
java.util.EmptyStackException
	at org.apache.commons.collections.ArrayStack.peek(ArrayStack.java:89)
	at org.apache.asn1.ber.digester.BERDigester.peek(BERDigester.java:279)
	at org.apache.ldap.common.berlib.asn1.decoder.bind.BindResponseRule.finish(BindResponseRule.java:58)
	at org.apache.asn1.ber.digester.BERDigester.fireFinishEvent(BERDigester.java:1132)
	at org.apache.asn1.ber.digester.BERDigester$DigesterCallback.decodeOccurred(BERDigester.java:196)
	at org.apache.asn1.ber.BERDecoder.fireDecodeOccurred(BERDecoder.java:355)
	at org.apache.asn1.ber.BERDecoder.updateStack(BERDecoder.java:404)
	at org.apache.asn1.ber.BERDecoder.decodeOccurred(BERDecoder.java:279)
	at org.apache.asn1.codec.stateful.AbstractStatefulDecoder.decodeOccurred(AbstractStatefulDecoder.java:119)
	at org.apache.asn1.ber.LengthDecoder.decode(LengthDecoder.java:53)
	at org.apache.asn1.ber.BERDecoder.decode(BERDecoder.java:152)
	at org.apache.asn1.ber.digester.BERDigester.decode(BERDigester.java:141)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.digest(SnickersDecoder.java:179)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.decode(SnickersDecoder.java:125)
	at org.apache.ldap.common.message.MessageDecoder.decode(MessageDecoder.java:106)
	at org.apache.ldap.clients.LdapBind.bind(LdapBind.java:342)
	at org.apache.ldap.clients.LdapBind.main(LdapBind.java:401)
Exception in thread "main" org.apache.ldap.common.message.spi.ProviderException: Snickers
decoder failure!
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.digest(SnickersDecoder.java:183)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.decode(SnickersDecoder.java:125)
	at org.apache.ldap.common.message.MessageDecoder.decode(MessageDecoder.java:106)
	at org.apache.ldap.clients.LdapBind.bind(LdapBind.java:342)
	at org.apache.ldap.clients.LdapBind.main(LdapBind.java:401)
Nested exceptions to follow:

java.util.EmptyStackException
	at org.apache.commons.collections.ArrayStack.peek(ArrayStack.java:89)
	at org.apache.asn1.ber.digester.BERDigester.peek(BERDigester.java:279)
	at org.apache.ldap.common.berlib.asn1.decoder.bind.BindResponseRule.finish(BindResponseRule.java:58)
	at org.apache.asn1.ber.digester.BERDigester.fireFinishEvent(BERDigester.java:1132)
	at org.apache.asn1.ber.digester.BERDigester$DigesterCallback.decodeOccurred(BERDigester.java:196)
	at org.apache.asn1.ber.BERDecoder.fireDecodeOccurred(BERDecoder.java:355)
	at org.apache.asn1.ber.BERDecoder.updateStack(BERDecoder.java:404)
	at org.apache.asn1.ber.BERDecoder.decodeOccurred(BERDecoder.java:279)
	at org.apache.asn1.codec.stateful.AbstractStatefulDecoder.decodeOccurred(AbstractStatefulDecoder.java:119)
	at org.apache.asn1.ber.LengthDecoder.decode(LengthDecoder.java:53)
	at org.apache.asn1.ber.BERDecoder.decode(BERDecoder.java:152)
	at org.apache.asn1.ber.digester.BERDigester.decode(BERDigester.java:141)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.digest(SnickersDecoder.java:179)
	at org.apache.ldap.common.berlib.asn1.SnickersDecoder.decode(SnickersDecoder.java:125)
	at org.apache.ldap.common.message.MessageDecoder.decode(MessageDecoder.java:106)
	at org.apache.ldap.clients.LdapBind.bind(LdapBind.java:342)
	at org.apache.ldap.clients.LdapBind.main(LdapBind.java:401)

	<<========= Last Nested Exception ========>>





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