Examples with MoveDecision org.elasticsearch.cluster.routing.allocation.MoveDecision used on opensource projects

Example 11 with MoveDecision

use of org.elasticsearch.cluster.routing.allocation.MoveDecision in project elasticsearch by elastic.

the class ClusterAllocationExplanationTests method randomClusterAllocationExplanation.

private static ClusterAllocationExplanation randomClusterAllocationExplanation(boolean assignedShard) {
    ShardRouting shardRouting = TestShardRouting.newShardRouting(new ShardId(new Index("idx", "123"), 0), assignedShard ? "node-0" : null, true, assignedShard ? ShardRoutingState.STARTED : ShardRoutingState.UNASSIGNED);
    DiscoveryNode node = assignedShard ? new DiscoveryNode("node-0", buildNewFakeTransportAddress(), emptyMap(), emptySet(), Version.CURRENT) : null;
    ShardAllocationDecision shardAllocationDecision;
    if (assignedShard) {
        MoveDecision moveDecision = MoveDecision.cannotRebalance(Decision.YES, AllocationDecision.NO, 3, null).withRemainDecision(Decision.YES);
        shardAllocationDecision = new ShardAllocationDecision(AllocateUnassignedDecision.NOT_TAKEN, moveDecision);
    } else {
        AllocateUnassignedDecision allocateDecision = AllocateUnassignedDecision.no(UnassignedInfo.AllocationStatus.DECIDERS_NO, null);
        shardAllocationDecision = new ShardAllocationDecision(allocateDecision, MoveDecision.NOT_TAKEN);
    }
    return new ClusterAllocationExplanation(shardRouting, node, null, null, shardAllocationDecision);
}

Example 12 with MoveDecision

use of org.elasticsearch.cluster.routing.allocation.MoveDecision in project elasticsearch by elastic.

the class ClusterAllocationExplainIT method testCannotAllocateStaleReplicaExplanation.

public void testCannotAllocateStaleReplicaExplanation() throws Exception {
    logger.info("--> starting 3 nodes");
    final String masterNode = internalCluster().startNode();
    // start replica node first, so it's path will be used first when we start a node after
    // stopping all of them at end of test.
    final String replicaNode = internalCluster().startNode();
    final String primaryNode = internalCluster().startNode();
    logger.info("--> creating an index with 1 primary and 1 replica");
    createIndexAndIndexData(1, 1, Settings.builder().put("index.routing.allocation.include._name", primaryNode).put("index.routing.allocation.exclude._name", masterNode).build(), ActiveShardCount.ONE);
    client().admin().indices().prepareUpdateSettings("idx").setSettings(Settings.builder().put("index.routing.allocation.include._name", (String) null)).get();
    ensureGreen();
    assertThat(replicaNode().getName(), equalTo(replicaNode));
    assertThat(primaryNodeName(), equalTo(primaryNode));
    logger.info("--> stop node with the replica shard");
    internalCluster().stopRandomNode(InternalTestCluster.nameFilter(replicaNode));
    logger.info("--> index more data, now the replica is stale");
    indexData();
    logger.info("--> stop the node with the primary");
    internalCluster().stopRandomNode(InternalTestCluster.nameFilter(primaryNode));
    logger.info("--> restart the node with the stale replica");
    String restartedNode = internalCluster().startDataOnlyNode();
    // wait for the master to finish processing join.
    ensureClusterSizeConsistency();
    // wait until the system has fetched shard data and we know there is no valid shard copy
    assertBusy(() -> {
        ClusterAllocationExplanation explanation = client().admin().cluster().prepareAllocationExplain().setIndex("idx").setShard(0).setPrimary(true).get().getExplanation();
        assertTrue(explanation.getShardAllocationDecision().getAllocateDecision().isDecisionTaken());
        assertEquals(AllocationDecision.NO_VALID_SHARD_COPY, explanation.getShardAllocationDecision().getAllocateDecision().getAllocationDecision());
    });
    boolean includeYesDecisions = randomBoolean();
    boolean includeDiskInfo = randomBoolean();
    ClusterAllocationExplanation explanation = runExplain(true, includeYesDecisions, includeDiskInfo);
    ShardId shardId = explanation.getShard();
    boolean isPrimary = explanation.isPrimary();
    ShardRoutingState shardRoutingState = explanation.getShardState();
    DiscoveryNode currentNode = explanation.getCurrentNode();
    UnassignedInfo unassignedInfo = explanation.getUnassignedInfo();
    AllocateUnassignedDecision allocateDecision = explanation.getShardAllocationDecision().getAllocateDecision();
    MoveDecision moveDecision = explanation.getShardAllocationDecision().getMoveDecision();
    // verify shard info
    assertEquals("idx", shardId.getIndexName());
    assertEquals(0, shardId.getId());
    assertTrue(isPrimary);
    // verify current node info
    assertEquals(ShardRoutingState.UNASSIGNED, shardRoutingState);
    assertNull(currentNode);
    // verify unassigned info
    assertNotNull(unassignedInfo);
    // verify decision object
    assertTrue(allocateDecision.isDecisionTaken());
    assertFalse(moveDecision.isDecisionTaken());
    assertEquals(AllocationDecision.NO_VALID_SHARD_COPY, allocateDecision.getAllocationDecision());
    assertEquals(2, allocateDecision.getNodeDecisions().size());
    for (NodeAllocationResult nodeAllocationResult : allocateDecision.getNodeDecisions()) {
        if (nodeAllocationResult.getNode().getName().equals(restartedNode)) {
            assertNotNull(nodeAllocationResult.getShardStoreInfo());
            assertNotNull(nodeAllocationResult.getShardStoreInfo().getAllocationId());
            assertFalse(nodeAllocationResult.getShardStoreInfo().isInSync());
            assertNull(nodeAllocationResult.getShardStoreInfo().getStoreException());
        } else {
            assertNotNull(nodeAllocationResult.getShardStoreInfo());
            assertNull(nodeAllocationResult.getShardStoreInfo().getAllocationId());
            assertFalse(nodeAllocationResult.getShardStoreInfo().isInSync());
            assertNull(nodeAllocationResult.getShardStoreInfo().getStoreException());
        }
    }
    // verify JSON output
    try (XContentParser parser = getParser(explanation)) {
        verifyShardInfo(parser, true, includeDiskInfo, ShardRoutingState.UNASSIGNED);
        parser.nextToken();
        assertEquals("can_allocate", parser.currentName());
        parser.nextToken();
        assertEquals(AllocationDecision.NO_VALID_SHARD_COPY.toString(), parser.text());
        parser.nextToken();
        assertEquals("allocate_explanation", parser.currentName());
        parser.nextToken();
        assertEquals("cannot allocate because all found copies of the shard are either stale or corrupt", parser.text());
        verifyStaleShardCopyNodeDecisions(parser, 2, Collections.singleton(restartedNode));
    }
}