[rules-users] Drools KB Object hierarchy Serialisation and Deserialisation thread safety issue
adarsh.chaini at hsbcib.com
adarsh.chaini at hsbcib.com
Wed Dec 18 06:04:36 EST 2013
Also remember that even 5.6, while a bit more robust from that
perspective, is not guaranteed to be 100% thread safe.
Is there a document that details this robustness and what has changed ?.
Ruleflows, however, have been informally deprecated in favor of proper
bpmn business processes for a while, so not much
was added there, but they should still be supported in 5.6.
On above , what is the time line from deprecation to complete removal in
future versions?.
How easy it is to migrate from the rule flow to the jbpmn? .Is there a
quick migration procedure/tool.
Thanks and regards,
Adarsh CHAINI
SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC Bank Plc
8 Canada Square, London E14 5HQ, UK
_______________________________________________
Phone
Int: (0)79914720 Ext: +44 (0)20 79914720
Mobile
+44(0)7595530105
Email
adarsh.chaini at hsbcib.com
_______________________________________________
Protect our environment - please only print this if you have to!
From:
Davide Sottara <dsotty at gmail.com>
To:
Rules Users List <rules-users at lists.jboss.org>
Date:
18/12/2013 07:42
Subject:
Re: [rules-users] Drools KB Object hierarchy Serilisation and
Deserialisation thread safety issue
Sent by:
rules-users-bounces at lists.jboss.org
Adarsh,
CR1 is "candidate release 1" and is available from the JBoss Maven
Repositories. 5.6.0.Final will probably be released this week.
There are quite a few internal differences between 5.3 and 5.6, but as far
as I know the APIs have remained the same,
so it should be possible to switch almost effortlessly. Others may be able
to comment on their upgrade experience.
Ruleflows, however, have been informally deprecated in favor of proper
bpmn business processes for a while, so not much
was added there, but they should still be supported in 5.6.
Also remember that even 5.6, while a bit more robust from that
perspective, is not guaranteed to be 100% thread safe.
Davide
On 12/17/2013 07:00 AM, adarsh.chaini at hsbcib.com wrote:
Davide,
Thanks for your reply on this.What does CR1 stands for in 5.6.0.CR1 and
can someone point me to the release life cycle timelines?.
Also the important aspect is are 5.6.0.CR1 and 5.5.0.Final versions
backward compatible to 5.3.0.Final and fully regressed ?
Is there any documentation that describes the major changes like this
.We are mostly using the rule engine with the rule flow aspects of the
product
Thanks and regards,
Adarsh CHAINI
From:
Davide Sottara <dsotty at gmail.com>
To:
rules-users at lists.jboss.org
Date:
14/12/2013 19:56
Subject:
Re: [rules-users] Drools KB Object hierarchy Serilisation and
Deserialisation thread safety issue
Sent by:
rules-users-bounces at lists.jboss.org
As far as I know, older versions of Drools were not guaranteed to be
thread-safe,
and the whole (de)serialization subsystem has been upgraded since
5.3.0.Final.
Could you try a later version such as 5.5.0.Final or 5.6.0.CR1?
Bugs and issues are usually reported using JIRA (community) or Bugzilla
(product)
You can find more information on how to report/contribute here:
http://www.jboss.org/contribute
or in the drools documentation, chapter 1.2
Davide
On 12/13/2013 12:39 PM, adarsh.chaini at hsbcib.com wrote:
Hi,
We have found that some of the drools classes are not thread safe and
hence causing the whole KB serialisation and deserialisation issues in
a highly concurrent distributed cluster.
The below is an example of one of the instances we have come across where
the usage of a non thread safe collection as instance variables has
caused the issue.
Could someone look into this and advise:
1) If this has been reported /identified and logged somewhere as an issue
already
2)If there has been any fix to problems like this in later versions of
5.3.0.Final ?.
3)If not fixed already what is the process to initiate a fix.
Caused by: java.io.InvalidObjectException: Illegal mappings count: -1
at java.util.HashMap.readObject(HashMap.java:1130)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(
ObjectStreamClass.java:1004)
at java.io.ObjectInputStream.readSerialData(
ObjectInputStream.java:1891)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1796)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at org.jbpm.workflow.core.DroolsAction.readExternal(
DroolsAction.java:61)
at
org.jbpm.workflow.core.impl.DroolsConsequenceAction.readExternal(
DroolsConsequenceAction.java:49)
at java.io.ObjectInputStream.readExternalData(
ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1794)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at org.drools.rule.JavaDialectRuntimeData.readExternal(
JavaDialectRuntimeData.java:182)
at java.io.ObjectInputStream.readExternalData(
ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1794)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at java.util.HashMap.readObject(HashMap.java:1155)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(
ObjectStreamClass.java:1004)
at java.io.ObjectInputStream.readSerialData(
ObjectInputStream.java:1891)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1796)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at org.drools.rule.DialectRuntimeRegistry.readExternal(
DialectRuntimeRegistry.java:59)
at java.io.ObjectInputStream.readExternalData(
ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1794)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at org.drools.rule.Package.readExternal(Package.java:197)
at java.io.ObjectInputStream.readExternalData(
ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1794)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at java.util.HashMap.readObject(HashMap.java:1155)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(
ObjectStreamClass.java:1004)
at java.io.ObjectInputStream.readSerialData(
ObjectInputStream.java:1891)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1796)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at org.drools.common.AbstractRuleBase.readExternal(
AbstractRuleBase.java:270)
at org.drools.reteoo.ReteooRuleBase.readExternal(
ReteooRuleBase.java:223)
at org.drools.impl.KnowledgeBaseImpl.readExternal(
KnowledgeBaseImpl.java:116)
at java.io.ObjectInputStream.readExternalData(
ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readOrdinaryObject(
ObjectInputStream.java:1794)
at java.io.ObjectInputStream.readObject0(
ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at com.hsbc.gbm.dsl.domain.DSLRuleSet$Serializer.createInstance(
DSLRuleSet.java:328)
at com.hsbc.gbm.dsl.domain.DSLRuleSet$Serializer.createInstance(
DSLRuleSet.java:1)
at com.hsbc.gbm.dsl.domain.AbstractSerializer.deserialize(
AbstractSerializer.java:144)
Thanks and regards,
Adarsh CHAINI
SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC Bank Plc
8 Canada Square, London E14 5HQ, UK
_______________________________________________
Phone
Int: (0)79914720 Ext: +44 (0)20 79914720
Mobile
+44(0)7595530105
Email
adarsh.chaini at hsbcib.com
_______________________________________________
Protect our environment - please only print this if you have to!
************************************************************
HSBC Bank plc may be solicited in the course of its placement efforts for
a new issue, by investment clients of the firm for whom the Bank as a firm
already provides other services. It may equally decide to allocate to its
own proprietary book or with an associate of HSBC Group. This represents a
potential conflict of interest. HSBC Bank plc has internal arrangements
designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
offering as well as internal systems, controls and procedures to identify
and manage conflicts of interest.
HSBC Bank plc
Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom
Registered in England - Number 14259
Authorised by the Prudential Regulation Authority and regulated by the
Financial Conduct Authority and the Prudential Regulation Authority
************************************************************
----------------------------------------- SAVE PAPER - THINK BEFORE YOU
PRINT! This transmission has been issued by a member of the HSBC Group
"HSBC" for the information of the addressee only and should not be
reproduced and/or distributed to any other person. Each page attached
hereto must be read in conjunction with any disclaimer which forms part of
it. Unless otherwise stated, this transmission is neither an offer nor the
solicitation of an offer to sell or purchase any investment. Its contents
are based on information obtained from sources believed to be reliable but
HSBC makes no representation and accepts no responsibility or liability as
to its completeness or accuracy.
_______________________________________________
rules-users mailing list
rules-users at lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users at lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
************************************************************
HSBC Bank plc may be solicited in the course of its placement efforts for
a new issue, by investment clients of the firm for whom the Bank as a firm
already provides other services. It may equally decide to allocate to its
own proprietary book or with an associate of HSBC Group. This represents a
potential conflict of interest. HSBC Bank plc has internal arrangements
designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
offering as well as internal systems, controls and procedures to identify
and manage conflicts of interest.
HSBC Bank plc
Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom
Registered in England - Number 14259
Authorised by the Prudential Regulation Authority and regulated by the
Financial Conduct Authority and the Prudential Regulation Authority
************************************************************
----------------------------------------- SAVE PAPER - THINK BEFORE YOU
PRINT! This transmission has been issued by a member of the HSBC Group
"HSBC" for the information of the addressee only and should not be
reproduced and/or distributed to any other person. Each page attached
hereto must be read in conjunction with any disclaimer which forms part of
it. Unless otherwise stated, this transmission is neither an offer nor the
solicitation of an offer to sell or purchase any investment. Its contents
are based on information obtained from sources believed to be reliable but
HSBC makes no representation and accepts no responsibility or liability as
to its completeness or accuracy.
_______________________________________________
rules-users mailing list
rules-users at lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users at lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
************************************************************
HSBC Bank plc may be solicited in the course of its placement efforts for
a new issue, by investment clients of the firm for whom the Bank as a firm
already provides other services. It may equally decide to allocate to its
own proprietary book or with an associate of HSBC Group. This represents a
potential conflict of interest. HSBC Bank plc has internal arrangements
designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
offering as well as internal systems, controls and procedures to identify
and manage conflicts of interest.
HSBC Bank plc
Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom
Registered in England - Number 14259
Authorised by the Prudential Regulation Authority and regulated by the
Financial Conduct Authority and the Prudential Regulation Authority
************************************************************
************************************************************
HSBC Bank plc may be solicited in the course of its placement efforts for
a new issue, by investment clients of the firm for whom the Bank as a firm
already provides other services. It may equally decide to allocate to its
own proprietary book or with an associate of HSBC Group. This represents a
potential conflict of interest. HSBC Bank plc has internal arrangements
designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
offering as well as internal systems, controls and procedures to identify
and manage conflicts of interest.
HSBC Bank plc
Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom
Registered in England - Number 14259
Authorised by the Prudential Regulation Authority and regulated by the
Financial Conduct Authority and the Prudential Regulation Authority
************************************************************
************************************************************
HSBC Bank plc may be solicited in the course of its placement efforts for
a new issue, by investment clients of the firm for whom the Bank as a firm
already provides other services. It may equally decide to allocate to its
own proprietary book or with an associate of HSBC Group. This represents a
potential conflict of interest. HSBC Bank plc has internal arrangements
designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
offering as well as internal systems, controls and procedures to identify
and manage conflicts of interest.
HSBC Bank plc
Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom
Registered in England - Number 14259
Authorised by the Prudential Regulation Authority and regulated by the
Financial Conduct Authority and the Prudential Regulation Authority
************************************************************
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