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| Original file line number | Diff line number | Diff line change |
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| v1.2.0 Release Notes - July 3, 2018 | ||
| ---------------------------------------- | ||
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| What's New in v1.2 | ||
| ------------------ | ||
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| The following features/epics are included in this release: | ||
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| FAB-8718 - Channel Private Data | ||
| Keep chaincode data confidential among a subset of channel members. | ||
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| FAB-8727 - Access control for peer functions | ||
| Configure which client identities can interact with peer functions, per channel. | ||
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| FAB-8729 - Pluggable endorsement and validation | ||
| Utilize pluggable endorsement and validation logic per chaincode. | ||
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| FAB-8779 - Service Discovery | ||
| Discover network services dynamically, including orderers, peers, chaincode, | ||
| and endorsement policies, to simplify client applications. | ||
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| Hygiene and Technical debt | ||
| Ginkgo-based integration tests have been added, and component code has been | ||
| refactored for improved readability and maintainability. | ||
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| Changes, Known Issues, and Workarounds | ||
| -------------------------------------- | ||
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| FAB-10151 - configtx.yaml samples fixed | ||
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| Previous releases included example input files for configtxgen (configtx.yaml) | ||
| that contained invalid YAML which referenced YAML anchors before they were | ||
| defined. It was not a problem in prior releases since the golang YAML parser | ||
| tolerated references before definitions. | ||
| The configtx.yaml samples are corrected in version v1.2. Users are advised | ||
| to evaluate their configtxgen input documents for places where YAML anchors | ||
| are referenced before they are defined. Either reorder nodes to ensure | ||
| anchors are defined before they are referenced, or re-create YAML documents | ||
| using the updated configtx.yaml sample documents as a starting point. | ||
| Refer to https://jira.hyperledger.org/browse/FAB-10151 for more details. | ||
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| FAB-8557 - Transaction index and query behavior changed | ||
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| There is a change to how some of the indexes maintained by ledger are updated. | ||
| Specifically, this includes indexes that maintain information by txid. In the rare | ||
| scenario when two transactions were submitted with the same transaction ids, | ||
| in the previous releases, the last transaction would be indexed. Only the first | ||
| instance of a transaction can be valid, therefore it was possible for an invalid | ||
| transaction to overwrite the status of a valid transaction, and therefore APIs | ||
| such as 'GetTransactionByID' and 'GetBlockByTxID' may return the latter invalid | ||
| transaction. In these cases the ledger remained correct, however transaction | ||
| queries may have returned unexpected results. | ||
| In this release, the behavior is changed so that the first transaction (the only | ||
| instance that can be valid) will not be overwritten in the index. | ||
| In the rare scenario where this problem has occurred on a channel, the peer's | ||
| transaction index can be rebuilt after upgrading to version v1.2, by stopping the | ||
| peer, deleting the <CORE_PEER_FILESYSTEMPATH>/ledgersData/chains/index directory, | ||
| and restarting the peer. The peer will automatically rebuild its indexes | ||
| using the new behavior. | ||
| Refer to https://jira.hyperledger.org/browse/FAB-8557 for more details. | ||
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| FAB-8877 - Reserved field validation for CouchDB state database | ||
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| Prior releases did not validate chaincode data against all state database | ||
| content restrictions. Specifically, version v1.2 adds validation during | ||
| chaincode execution to ensure that keys that will be written to CouchDB | ||
| state database are UTF8 complaint, do not start with an underscore, and | ||
| that there are no top-level JSON fields named '~version' or that start with | ||
| underscores, as these fields are reserved for use by CouchDB (and Fabric). | ||
| If these conditions are found during chaincode execution, an error will | ||
| be returned to the client in the proposal response. | ||
| For the same reason, all peers on a channel must utilize the same state | ||
| database type, and it is not possible to convert a channel's peers from | ||
| using LevelDB state database to CouchDB state database, unless the | ||
| chaincode performs the same validations. | ||
| Refer to https://jira.hyperledger.org/browse/FAB-8877 for more details. | ||
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| Known Vulnerabilities | ||
| --------------------- | ||
| FAB-8664 - Peer does not detect his own org ejection | ||
| This is a relatively low severity problem, because it requires a significant | ||
| conspiracy of network admins, but it will be addressed in an upcoming release. | ||
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| Resolved Vulnerabilities | ||
| ------------------------ | ||
| FAB-10537 - Reject CONFIG/ORDERER_TRANSACTION messages | ||
| Ensures that clients cannot submit transactions intended to be generated | ||
| from orderer nodes. | ||
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| Other improvements and fixes | ||
| ---------------------------- | ||
| For the full list of improvements and fixes, refer to the release change log: | ||
| https://github.com/hyperledger/fabric/blob/master/CHANGELOG.md#v120 |