BUG-8402: fix sequencing with read/exists requests 78/57378/1
authorRobert Varga <robert.varga@pantheon.tech>
Sun, 14 May 2017 18:36:09 +0000 (20:36 +0200)
committerRobert Varga <robert.varga@pantheon.tech>
Thu, 18 May 2017 15:34:17 +0000 (17:34 +0200)
commit225fa198c5964a505695afb60f4adbcd9e9bebf5
tree275669b918fd65059611cfc61f2fd2c35206f109
parent1809fde3e42906ae55e7ac3333cf0699aa4d37c2
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>
(cherry picked from commit 7f15e81c52f2efda779c670580f0697227557404)
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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