fix: determine whether indexLabel is null

[corgiboygsj]

No description provided.

[codecov]

Codecov Report

Merging #1629 (0d9b602) into master (43b8ae7) will increase coverage by 0.03%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##             master    #1629      +/-   ##
============================================
+ Coverage     63.20%   63.24%   +0.03%     
- Complexity     6756     6759       +3     
============================================
  Files           421      421              
  Lines         34642    34645       +3     
  Branches       4797     4798       +1     
============================================
+ Hits          21897    21910      +13     
+ Misses        10475    10460      -15     
- Partials       2270     2275       +5     

Impacted Files	Coverage Δ
...du/hugegraph/backend/tx/GraphIndexTransaction.java	84.00% <0.00%> (-0.11%)	⬇️
.../baidu/hugegraph/backend/tx/SchemaTransaction.java	89.76% <60.00%> (-0.68%)	⬇️
.../java/com/baidu/hugegraph/auth/RolePermission.java	91.76% <0.00%> (+1.17%)	⬆️
...in/java/com/baidu/hugegraph/auth/HugeResource.java	79.22% <0.00%> (+1.29%)	⬆️
...va/com/baidu/hugegraph/auth/HugeAuthenticator.java	40.21% <0.00%> (+5.43%)	⬆️

---

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[z7658329]

error stack:

2021-11-05 15:47:09 156642 [gremlin-server-exec-2] [WARN ] org.apache.tinkerpop.gremlin.server.handler.HttpGremlinEndpointHandler [] - Invalid request - responding with 500 Internal Server Error and Error encountered evaluating script: g.V().hasLabel("v_app").has("appMapAthena","huyasz-videoinfoserver").limit(1250)
java.lang.NullPointerException: null
        at com.baidu.hugegraph.backend.tx.GraphIndexTransaction.collectMatchedIndex(GraphIndexTransaction.java:721) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphIndexTransaction.collectMatchedIndexes(GraphIndexTransaction.java:700) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphIndexTransaction.queryByUserprop(GraphIndexTransaction.java:427) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphIndexTransaction.queryIndex(GraphIndexTransaction.java:364) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphTransaction.indexQuery(GraphTransaction.java:1395) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphTransaction.optimizeQueries(GraphTransaction.java:1296) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphTransaction.query(GraphTransaction.java:520) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphTransaction.queryVerticesFromBackend(GraphTransaction.java:757) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.cache.CachedGraphTransaction.queryVerticesFromBackend(CachedGraphTransaction.java:186) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.backend.tx.GraphTransaction.queryVertices(GraphTransaction.java:746) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.StandardHugeGraph.vertices(StandardHugeGraph.java:573) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.traversal.optimize.HugeGraphStep.vertices(HugeGraphStep.java:117) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at com.baidu.hugegraph.traversal.optimize.HugeGraphStep.lambda$new$0(HugeGraphStep.java:68) ~[hugegraph-core-0.11.2.jar:0.11.2.0]
        at org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphStep.processNextStart(GraphStep.java:155) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:143) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.process.traversal.step.util.ExpandableStepIterator.next(ExpandableStepIterator.java:50) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.process.traversal.step.filter.FilterStep.processNextStart(FilterStep.java:37) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:143) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.hasNext(DefaultTraversal.java:197) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils.fill(IteratorUtils.java:62) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils.list(IteratorUtils.java:85) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils.asList(IteratorUtils.java:382) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.server.handler.HttpGremlinEndpointHandler.lambda$channelRead$1(HttpGremlinEndpointHandler.java:245) ~[gremlin-server-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.util.function.FunctionUtils.lambda$wrapFunction$0(FunctionUtils.java:36) ~[gremlin-core-3.4.3.jar:3.4.3]
        at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eval$0(GremlinExecutor.java:272) ~[gremlin-groovy-3.4.3.jar:3.4.3]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_112]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_112]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_112]
        at com.baidu.hugegraph.auth.HugeGraphAuthProxy$ContextTask.run(HugeGraphAuthProxy.java:1538) [hugegraph-api-0.11.2.jar:0.58.0.0]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_112]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_112]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112]