Bpel Manual Recovery

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For BPEL process faults to be identified as recoverable, there must be a fault policy defined that is bound to the fault (through the fault-bindings.xml file) and which triggers the action ora-human-intervention. However, without defining any fault policies, the fault takes its standard course as either a recoverable or nonrecoverable fault. Click the Help icon for details. Note that fault recovery selection at the BPEL process service component level equals the SOA Infrastructure level, SOA composite application level, and Oracle Mediator service component level. With the row highlighted, select a specific action from the Recovery Action list, as described in Step 5. This displays complete fault details, including the fault ID, fault time, fault location, fault type, and error message text. A Recover Now option is displayed for recoverable faults. Click Recover Now to access the Faults page of the instance audit trail to perform fault recovery. In most cases, fault policy actions are automatically executed. The only exception is if you defined a fault policy that uses the action ora-human-intervention. This action creates a recoverable fault that can be recovered from Oracle Enterprise Manager Fusion Middleware Control. An example of a scenario in which to use this recovery action is when the fault occurred because the service provider was not reachable due to a network error. The network error is now resolved. BPEL fault handlers (catch branches) are used to handle the fault. By default, all exceptions are caught by the fault management framework unless an explicit rethrow fault policy is provided. Click the Help icon for a description of these fault types. The fault ID is also displayed when you click an error message. Note that rejected messages do not have a component instance ID. Policies apply security to the delivery of messages. Oracle Fusion Middleware uses a policy-based model to manage web services. http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/breadman-breadmaker-tr-441-manual.xml

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Before attaching policies, see Oracle Fusion Middleware Security and Administrator's Guide for Web Services for definitions of available policies and details about which ones to use in your environment. The Policies section displays the attached policy name, the policy reference status (enabled or disabled) that you can toggle, the category (Management, Reliable Messaging, MTOM Attachment, Security, or WS-Addressing), the violations, and the authentication, authorization, confidentiality, and integrity failures since the SOA Infrastructure was last restarted. Additional policies available for attachment appear in the Available Policies section. All BPEL process service component faults, regardless of the SOA composite application instance of which they are a part, can be viewed in the BPEL process service engine. However, without defining any fault policies, the fault takes its standard course as either a recoverable or nonrecoverable fault. Click the Help icon for details. As with fault recovery at the SOA Infrastructure level, SOA composite application level, and Oracle Mediator service component level, you can perform single fault recovery, bulk fault recovery, and recovery of all faults.In most cases, fault policy actions are automatically executed. By default, all exceptions are caught by the fault management framework unless an explicit rethrow fault policy is provided. Click the Help icon for a description of these fault types. The fault ID is also displayed when you click an error message. Note that rejected messages do not have a component instance ID. Recovery of invoke messages applies to asynchronous BPEL processes only. Synchronous BPEL processes return an error to the calling client and are not recoverable from the Recovery page. Recoverable activities are activities that failed and can be recovered. http://www.rachelledelcroix.nl/upload/breadman-bread-maker-user-manual.xml

For example, if you are using the file adapter to initiate an asynchronous BPEL process and your system fails while the instance is processing, you can manually perform recovery when the server restarts to ensure that all message records are recovered. To ensure that automatic recovery of these messages is not attempted multiple times, these messages are placed in the exhausted state. You can then perform one of the following actions on these messages: If the database is down, these messages are sent to a recovery queue. Automatic recovery of these messages fails while the database is down. Such messages are marked with the exhausted state so that automatic recovery is not attempted on them again. When the database begins running again, you can reset these messages (return them to the automatic recovery queue) so that an automatic recovery is attempted on them again. For example, assume a timer on a wait activity or on an onAlarm branch of a pick activity was initiated, but the transaction was rolled back.Click the Help icon for details. The ECID value enables you to track a message flow that crosses instances of different composite applications. If there are BPEL process messages requiring recovery and the AuditConfig property in the System MBean Browser is set to All (the default value), the following message is displayed in the Trace table of the Flow Trace page: You can copy the ECID value from the Warning dialog, paste it into the ECID field, and select the recoverable message type from the Type list as part of creating your search criteria on the Recovery page. Depending on the state, you can recover these messages immediately, cancel these messages, or reset these messages for automatic recovery. These messages can be displayed for recovery when you execute search criteria in which you select Callback from the Type list and either Resolved or Undelivered from the Message State list. http://www.drupalitalia.org/node/75389

When a callback message first enters the BPEL process service engine, its state is undelivered. When this message is resolved to the target BPEL process instance either through matching a conversation ID or a correlation, the state is switched to resolved. In both of these states, the messages have not yet been consumed. Messages in these two states can be recovered (redelivered into the BPEL process service engine for consumption). In other situations, the callback messages can become stranded in both of these states. Messages in these states can also be recovered. However, there is no guarantee that stranded callback messages always remain in an undelivered state. However, the Last Modified Date column remains empty for this instance on the Dashboard page of the Oracle BPEL Process Manager service component or service engine. This is the expected behavior. The last modified date is not displayed because the initial Oracle BPEL Process Manager instance (for example, bpel:70004 ) is created by the first invocation (that is, it is created, but has not yet been modified). The recovery of the undelivered invocation message always creates a new instance (for example, bpel:70005 ). The previously created instance (bpel:70004) is not used and remains permanently in the same status (the Last Modified Date column is empty). This information is provided for auditing purposes only. Should this recovery attempt also fail, the message is returned to the exhausted state. You must then select the message and click Reset to return the message to the automatic recovery queue. If this is a new instance, and a receive activity was the first dehydration activity, the BPEL process service engine creates a recoverable invoke. When you click Recover to recover the invoke, the service engine creates a new instance. This instance may run to completion with no exception error. However, you continue to see the older instance identified as faulted. https://christiansymbolkits.com/images/bpec-part-p-course-manual.pdf

If you select messages in the exhausted state and click this button, recovery is never attempted on them. This returns the message to the automatic recovery queue. The messages that are displayed in the exhausted state disappear from the messages table. If you select Undelivered from the Message State list and click Search, these messages are displayed. Note that callback messages in the exhausted state can also be reset to the resolved state and still remain recoverable. This typically takes less than several seconds. During this time, the message remains visible in the Recovery page. Duplicate attempts to recover the same message in that period are ignored. Refresh the page every few seconds to receive the latest recovery status. If you define a fault policy in a BPEL process with an ora-retry action and a fault occurs, the BPEL process attempts to recover from the fault the number of times you specified with the retryCount parameter. After this period, the process continues to be in a running state. The status of an activity in the process that has not completed (such as an invoke or receive) shows as pending a manual recovery. This is the expected behavior. Legal Notices. The cause of these failures could be either Business errors or System errors. When Synchronous Integration Flows fail, they are restarted from the beginning. These milestones could be persistence points like queues topics or database tables, where the state of the flow was last persisted. Recovery is a mechanism whereby a faulted Asynchronous Flow can be rerun from such a persistence milestone. The SOA Suite 11g and AIA products provides various Automated and Manual recovery mechanisms to recover from asynchronous fault scenarios. They differ based on the SOA component that encounters the error. For instance, recovering from a BPEL fault may be quite different than recovering from a Resequencer fault. https://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1627f5a16de5e6---brothers-ql-500-manual.pdf

In this blog, we look at the various Manual Recovery mechanisms and options available to an end user. It aims to present some of the valuable information regarding Manual recovery in one place. These are currently available across many sources such as SOA Developers Guide, SOA Admin Guide, AIAFP Developers Guide and AIAFP Infrastructure and Utilities Guide. Next we look at the various Manual recovery mechanisms available in SOA Suite 11g and AIA, starting with the BPEL Message Recovery. BPEL Message Recovery To understand the BPEL Message Recovery, let us briefly look into how BPEL Service engine performs asynchronous processing. Asynchronous BPEL processes use an intermediate Delivery Store in the SOA Infrastructure Database to store the incoming request. The message is then picked up and further BPEL processing happens in an Invoke Thread. The processing of the message from the delivery Store onwards until the next dehydration in the BPEL process or the next commit point in the flow constitutes a transaction. Figure below shows at a high level the Asynchronous request handling by BPEL Invoke Thread. Any unhandled errors during this processing will cause the message to roll back to the delivery Store. The Delivery Store acts as a safe milestone for any errors that cause the asynchronous BPEL processing to rollback. In such scenarios these messages sitting in the delivery store can be resubmitted for processing using the BPEL Message Recovery. It is quite similar in case of Callback messages that arrive for in-flight BPEL process instances. The Callback messages are persisted in the Delivery Store and a free thread from the Engine Thread Pool will perform correlation and asynchronously process the callback activities. Callback messages from Faulted activities are available at the Delivery Store for Recovery. Refer to the section from FMW Administrator’s Guide here - for details on configuring the BPEL Service Engine Threadpools. www.drussoarts.com/userfiles/files/99-ford-contour-repair-manual-download.pdf

The admin user can search for recoverable messages by filtering based on available criteria on this page. The figure below shows the BPEL Engine Recovery page where the messages eligible for recovery are searched based on the message type and state. During Recovery of these messages, the end user cannot make any modifications to the original payload. The messages marked recoverable can either be recovered or aborted. In the former case, the original message is simply redelivered for processing again. Messages go to the exhausted state after reaching the MaxRecoverAttempt. The BPEL Service Engine can be configured to automatically recover failed messages, either on Server startup or during scheduled time periods. Refer to the section from FMW Administrator’s Guide here - for details on setting up auto recovery. SOA Fault Recovery The Fault Handling for invocations from SOA Components can be enhanced, customized and externalized by using the Fault Management Framework (FMF). We will not go into the details of Fault Management Framework here. Refer to this a-team blog post here - for insights into the FMF. In short FMF, allows a Fault Policy with configurable Actions to be bound to SOA Component. These can be attached at the Composite, Component or Reference levels. The configured Actions will be executed when the invocation fails. The available Actions could be retry, abort, human intervention, custom java callout, etc. For Retry options, the EM User has access to the payload. The payload can be changed and resubmitted during recovery. The retry action can also chain the execution into a custom java callout to do additional processing after a successful Retry. The custom java callout should be configured in the Fault Policy file attached to the composite. Resequencer Recovery Mediator Resequencer groups which end up in Errored or Timed Out states can be recovered from the EM Console by an Admin user. {-Variable.fc_1_url-

In fact Resequencer faults do not have other automated recovery mechanisms and rely on only Manual recovery by the admin for their remediation. Mediator Resequencer faults can be searched and filtered from the faults page of the Mediator component. Figure below shows a search of faults by the Resequencing Group. An Errored group can be recovered by either choosing to Retry or Abort. Retry will reprocess the current failed message belonging to the faulted Group. In case of abort, the current failed message is marked as failed and processing will resume from the next in sequence available message for the faulted Group. In both cases the group itself is unlocked and set to ready so that it can process further messages. As can be seen in the figure below, the Admin user can modify the request payload during this recovery. In case of Standard Resequencer, groups can end up as Timed Out when the next in sequence message does not arrive until the timeout period. Such groups can be recovered by skipping the missing message. Figure below shows such a recovery. In this case the processing of the group will continue from the next message rather than wait for the missing sequence id. AIA Message Resubmission This section deals with Integrations built using the AIA Foundation Pack. Refer to the AIA Concepts and Technologies Guide at to familiarize with the AIA concepts. Let us see a common design pattern employed in AIA Integrations. The Figure below is from the AIA Foundation Pack Developers Guide Document available and shows an architecture used for Guaranteed Message Delivery between Source and Target applications with no intermediate persistence points. The blocks shown are SOA Suite Composites. The Source and Target milestones are persistence points such as Queue, Topics or Database tables. The same design can also be enhanced to have multiple intermediate milestones in case of more complex flows. https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1627f5a4510767---broward-sheriff-s-office-policy-manual.pdf

Such Flows are commonly seen in AIA Pre Built Integrations which use Asynchronous flows to integrate systems. E.g. Communications O2C Integration Pack for Siebel, BRM and OSM. An enhanced Fault message (AIAFault) is raised and stored in the AIA Error Topic. This Fault has sufficient information to resubmit the message from the Source milestone. The Faults can be recovered using the AIA Error Resubmission Utility. In AIA Foundation Pack 11.1.1.7.0 the AIA Error Resubmission Utility is a GUI utility and can be used for single or bulk fault recoveries. Earlier versions of AIA foundation Pack 11g only have a command line utility for Error Resubmission. Any fault within the flow will roll back to the previous milestone or recovery point and enable resubmission from that point. The milestones could be Queues, Topics or AQ destinations. The Queues and Topics designed to be milestones are associated with corresponding Error Destinations. This is where the faulted messages reside. The AIA Resubmission Utility simply redelivers the messages from the fault destination back to the milestone destination for reprocessing in case of Queue or Topic. In the case of Resequencer errors, the Resequencer is the Recovery point and holds the message for resubmission. Note that Resequencer is not typically designed as a milestone in the flow but acts as a recovery point for Resequencer errors. For such errors, the AIA Resubmission utility recovers the failed Resequencer message and also unlocks the faulted Resequencer Group for further processing. It is important to note here that the AIA Error Handling and Resubmission Mechanism is a designed solution. It relies on the fact that the Integration implements the principles and guidelines of AIA Foundation Pack and AIA Guaranteed Message Delivery pattern for its accurate functioning. Refer to the AIA Foundation Pack Infrastructure and Utilities Guide at for details of the AIA Error Handling Framework and AIA Resubmission utility. www.drpaullampl.com/userfiles/files/bitscope20dso20manual.pdf

Refer to the AIA Foundation Pack Developers Guide at for implementing AIA Error Handling and Recovery for the Guaranteed Message Delivery Pattern. Use Case: Message Resubmission with Topic Consumers Let us next look at a use case from one of our customer engagements. It is a Custom Integration developed using AIA Guaranteed Message Delivery pattern and employing the AIA Resubmission utility for recovery. We can see how the above recovery mechanisms offer different options when designing a typical integration flow Without going deep into the details, the figure below shows at a high level the design used for delivering messages to 3 End Systems using a Topic and 3 Topic Consumers. The BPEL ABCS components consume the canonical message, convert it to the respective Application specific formats and deliver to the End Systems. The requirement was the guarantee delivery of the message to each of the 3 systems within the flow, which the design achieves under normal circumstances. However issues were observed at run-time for failure cases. When the message delivery fails for one of the Systems e.g. System B, the design caused a rollback of the message to the previous milestone which in this case is the Topic. The rolled back message residing in the Error destination is then redelivered to the Topic. The message is picked for processing again by all 3 Topic Consumers causing duplicate message delivered to Systems A and C. This issue can be addressed in a few ways; 1) Introducing an intermediate milestone after the message is consumed off the topic. For instance we could introduce a queue to hold the converted messages. (Indicated by point 1 in the figure) 2) Use separate queues instead of a topic to hold the canonical messages. In case of failures, only the message in the failed branch would have to be recovered using AIA Message Resubmission as seen in section above. However, both these options introduce additional queues which need to be maintained by the operations team. Also if in future an additional end systems were to be introduced, it would necessitate adding new queues in addition to new JMS consumers and ABCS components. 3) Introduce a transaction boundary: This can be done by changing the BPEL ABCS component use an Asynchronous One Way Delivery Policy. In this case, any failures cause the message to rollback not to the topic but to the internal BPEL Delivery store. (Indicated by point 2 in the figure) These messages can then be recovered manually using Bpel Message Recovery as we saw in the first section above. The recovery is limited only to the faulted branch of the integration. 4) Another option is to employ Fault Policies. We can attach a Fault Policy to the BPEL ABCS component. The policy invokes the human intervention action for faults encountered during end system invoke. The message can then be manually recovered from the EM FMWC Console as seen in the SOA Fault Recovery Section above. This would apply only to the faulted branches and hence avoid the duplicate message delivery to the other End Systems. Also another issue seen was that the end systems would lose messages that arrived when the consumers are offline. This problem can be addressed by configuring durable subscription for the Topic consumers. In the absence of Durable subscriptions, a Topic discards a message once it has been delivered to all the active subscribers. With Durable Subscribers, the message is retained until delivered to all the registered durable subscribers hence guaranteeing message delivery. Refer to the Adapters Users Guide here - for details on configuring Durable Subscriptions for Topic Consumers. Summary Table below summarizes the different Manual recoveries that we have seen and their main characteristics In this blog, we have seen the various Manual Fault Recovery mechanisms provided by SOA Suite and AIA 11g versions. We have also seen the security requirements for the Admin user to perform recovery and the variety of options available to handle the faults. This knowledge should enable us to design and administer robust integrations which have definite points of recovery. -Shreeni Please try again. This blog will discuss various options available to integrationValidation: August 6, 2020Introduction. This post details the steps required to create private Dedicated. Autonomous Database. Validation: August 5, 2020Introduction. This post details the steps required to create private. Dedicated Autonomous. Recovery is a mechanism whereby a faulted Asynchronous Flow can be rerun from such a persistence milestone Asynchronous BPEL processes use an intermediate Delivery Store in the SOA Infrastructure Database to store the incoming request. The message is then picked up and further BPEL The processing of the message from the delivery Store onwards until the next dehydration in the BPEL process or the next commit point in the flow constitutes a transaction. Any unhandled errors during this processing will cause the message to roll back to the delivery Store. The messages marked recoverable can either be recovered or aborted. In the former case, the original message is simply redelivered for processing again. These can be attached at the Composite, Component or Reference levels. The available Actions could be retry, abort, human intervention, custom java callout, etc.Well, BPEL PM doesn’t have that capability if we want BPEL Auto recovery is enabled By default auto recovery feature will be active from 12AM to 4AM everyday (remember that it’s SOA server time), shown in above screenshot. We can change these settings by simply updating the time values in 24 hr format and do click on Apply. The default value is 2. If Auto Recovery is enabled, after threshHoldTimeInMinutes BPEL runtime will try to auto recover the instance. If it’s not successful, again number of recovery attempts will be made as given for MaxRecoverAttempt with an If instance fails even after these maximum recover attempts, A small part of this feature was available since SOA 11.1.1.5 but just for the Composite Flow Trace, so you had to know the flow trace where you could have problems. Now clicking the soa-infra inside EM, we see a global alert that there are messages needing recovery. Actually this was a new feature for me as I ever explored and considered during the development though I heard of manual recovery. This made me realize that I am still novice:). And does not discuss about required configuration in clustered environment, startup related configuration and Callback Recovery. This will bring up the following screen showing the default parameters. BPEL Auto recovery is enabled by default. By default auto recovery feature will be active from 12AM to 4AM everyday (remember that it’s SOA server time), shown in above screenshot. We can change these settings by simply updating the time values in 24 hr format and do click on Apply. The default value is 2. We can manually recover the faulted instances from this console when Auto recovery is not enabled. If Auto Recovery is enabled, after threshHoldTimeInMinutes BPEL runtime will try to auto recover the instance. If it’s not successful, again number of recovery attempts will be made as given for MaxRecoverAttempt with an interval as given for subsequentTriggerDelay. If instance fails even after these maximum recover attempts, the instance will be marked as exhausted (can be queried on recovery console using message state as exhausted).This BPEL has invoke activity that results in RemoteFault and dehydrate activity after that. Observe that retry happened by initiating process from the start as there is no dehydration point before faulted invoke. Observe the time difference between the successive recovery attempts. This case also demonstrates that auto recovery will happen from the last break point. The highlighted part shown below shows the difference from the previous scenario with Dehydrate activity along with remote fault at invoke activity level. Assign3 is the first activity after the dehydrate activity so the recovery should happen from this activity. Observe the difference from previous run in this flow trace. Now the entire BPEL process is not started rather it starts from Assign 3 activity as expected. However, the same is not verified in case of Durable Sync BPEL processes for the time being. Learn how your comment data is processed. EM console Recovery button. The state set for undelivered instances is 0 in the code. Regards Albin I Reply Delete Replies Reply Kola January 16, 2013 at 4:37 PM Hi Albin, Have you tried WLST for this anytime. Tx, Deepak Reply Delete Replies Reply Albin January 16, 2013 at 11:58 PM I did not tried this but this should be possible even through the WLST script using the MBean. Regards Albin I Reply Delete Replies Reply Unknown January 18, 2013 at 6:58 PM Hi Albin, What is the difference between recover invoke, callback or activity and which appears in what situation. In my composite I am calling a Human workflow and after human workflow completes we are calling another service. If any error occurs in Human workflow then its coming into invoke recovery and if any error occurs after human workflow then its coming into activity recovery. Please let me know if you want me to explain it again Reply Delete Replies Albin January 25, 2013 at 1:31 AM I could not able to find any proper documentation related to this anyhow based on my experience i am writing the below details- If a calling process has the receive activity to receive the call back from the other process and encountoured some issues(like transformation and assign issues) before reciving the callback then the calling process instance will be rolled backed to the previous transaction point and the instance will goes to the recovery queue as a callback type. If a calling process has a invoke activity and the instance failed after the invoke activity then the instance will be rolled backed to the previous transaction point and the instance will goes to the recovery queue as a invoke type. If the instance failes other than the above scenarios in any of the activities then the instance will goes to the recovery queue as a Activity type. Delete Replies Reply Reply Unknown November 22, 2013 at 7:28 AM Hi, My service is calling a plsql custom package and which is calling another plsql custom package. Instance is going into Recovery. Please advice. Reply Delete Replies Reply Anonymous December 5, 2013 at 11:23 AM Hi Albin, I want to access my bpel payload in a java class, which has been called from my fault polcy. Can you tell me how to do that???? Reply Delete Replies Reply Add comment Load more. Eager Loading in EJB 3.0. WS-Addressing and Correlation sets Maarten Smeets February 28, 2016 1 Facebook 0 Twitter Linkedin There are different ways to achieve asynchronous interaction in Oracle SOA Suite. In this blog article, I’ll explain some differences between WS-Addressing and using correlation sets (in BPEL but also mostly valid for BPM). I’ll cover topics like how to put the Service Bus between calls, possible integration patterns and technical challenges. I will also shortly describe recovery options.