desc = master.getTableDescriptors().get(
TableName.valueOf(snapshot.getTable()));
} catch (FileNotFoundException e) {
String msg = "Table:" + snapshot.getTable() + " info doesn't exist!";
LOG.error(msg);
throw new SnapshotCreationException(msg, e, snapshot);
} catch (IOException e) {
throw new SnapshotCreationException("Error while geting table description for table "
+ snapshot.getTable(), e, snapshot);
}
if (desc == null) {
throw new SnapshotCreationException("Table '" + snapshot.getTable()
+ "' doesn't exist, can't take snapshot.", snapshot);
}
// if not specified, set the snapshot format
if (!snapshot.hasVersion()) {
snapshot = snapshot.toBuilder()
.setVersion(SnapshotDescriptionUtils.SNAPSHOT_LAYOUT_VERSION)
.build();
}
// call pre coproc hook
MasterCoprocessorHost cpHost = master.getMasterCoprocessorHost();
if (cpHost != null) {
cpHost.preSnapshot(snapshot, desc);
}
// if the table is enabled, then have the RS run actually the snapshot work
TableName snapshotTable = TableName.valueOf(snapshot.getTable());
AssignmentManager assignmentMgr = master.getAssignmentManager();
if (assignmentMgr.getTableStateManager().isTableState(snapshotTable,
ZooKeeperProtos.Table.State.ENABLED)) {
LOG.debug("Table enabled, starting distributed snapshot.");
snapshotEnabledTable(snapshot);
LOG.debug("Started snapshot: " + ClientSnapshotDescriptionUtils.toString(snapshot));
}
// For disabled table, snapshot is created by the master
else if (assignmentMgr.getTableStateManager().isTableState(snapshotTable,
ZooKeeperProtos.Table.State.DISABLED)) {
LOG.debug("Table is disabled, running snapshot entirely on master.");
snapshotDisabledTable(snapshot);
LOG.debug("Started snapshot: " + ClientSnapshotDescriptionUtils.toString(snapshot));
} else {
LOG.error("Can't snapshot table '" + snapshot.getTable()
+ "', isn't open or closed, we don't know what to do!");
TablePartiallyOpenException tpoe = new TablePartiallyOpenException(snapshot.getTable()
+ " isn't fully open.");
throw new SnapshotCreationException("Table is not entirely open or closed", tpoe, snapshot);
}
// call post coproc hook
if (cpHost != null) {
cpHost.postSnapshot(snapshot, desc);