BUG-8402: fix sequencing with read/exists requests 28/57028/17
authorRobert Varga <robert.varga@pantheon.tech>
Sun, 14 May 2017 18:36:09 +0000 (20:36 +0200)
committerThanh Ha <thanh.ha@linuxfoundation.org>
Thu, 18 May 2017 15:12:33 +0000 (15:12 +0000)
commit7f15e81c52f2efda779c670580f0697227557404
treed4061d773d1ab94735c8182652aeeffc8a757a72
parent63e6ab3f36e57954baf391855541cf3d42d38a0f
BUG-8402: fix sequencing with read/exists requests

When replaying successful requests, we do not issue read and exists
requests, as they have already been satisfied, but account for their
sequence numbers.

This does not work in the case where we have a remote connection,
the first request on a transaction is a read and after it is
satisfied subsequent requests are replayed to a different backend
leader.

Since the initial request is not replayed, but subsequent requests
account for it and the backend has no prior knowledge of the
transaction, it sees an initial request with sequence != 0, and
rejects all requests with an OutOfOrderRequestException.

Fix this by introducing IncrementTransactionSequenceRequest, which
the frontend enqueues as the first request instead of the initial
read/exist request -- introducing the transaction to backend.

Change-Id: Ia0f048e33d417e1fdc8d15bf319d6b8b33c2b1b1
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
opendaylight/md-sal/cds-access-api/src/main/java/org/opendaylight/controller/cluster/access/commands/IncrementTransactionSequenceRequest.java [new file with mode: 0644]
opendaylight/md-sal/cds-access-api/src/main/java/org/opendaylight/controller/cluster/access/commands/IncrementTransactionSequenceRequestProxyV1.java [new file with mode: 0644]
opendaylight/md-sal/cds-access-api/src/main/java/org/opendaylight/controller/cluster/access/commands/IncrementTransactionSequenceSuccess.java [new file with mode: 0644]
opendaylight/md-sal/cds-access-api/src/main/java/org/opendaylight/controller/cluster/access/commands/IncrementTransactionSequenceSuccessProxyV1.java [new file with mode: 0644]
opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/AbstractProxyTransaction.java
opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/LocalProxyTransaction.java
opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/RemoteProxyTransaction.java
opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/AbstractFrontendHistory.java
opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/FrontendTransaction.java

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