1. Py4JJavaError: An error occurred while calling o197.showString.
2. : java.lang.NoClassDefFoundError: org/apache/spark/sql/catalyst/expressions/IfNull
3.  at org.apache.ignite.spark.impl.optimization.SystemExpressions$.apply(SystemExpressions.scala:35)
4.  at org.apache.ignite.spark.impl.optimization.package$.$anonfun$exprsAllowed$2(package.scala:100)
5.  at org.apache.ignite.spark.impl.optimization.package$.$anonfun$exprsAllowed$2$adapted(package.scala:100)
6.  at scala.collection.LinearSeqOptimized.exists(LinearSeqOptimized.scala:95)
7.  at scala.collection.LinearSeqOptimized.exists$(LinearSeqOptimized.scala:92)
8.  at scala.collection.immutable.List.exists(List.scala:91)
9.  at org.apache.ignite.spark.impl.optimization.package$.exprsAllowed(package.scala:100)
10.  at org.apache.spark.sql.ignite.IgniteOptimization$$anonfun$pushDownOperators$1.applyOrElse(IgniteOptimization.scala:109)
11.  at org.apache.spark.sql.ignite.IgniteOptimization$$anonfun$pushDownOperators$1.applyOrElse(IgniteOptimization.scala:63)
12.  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUpWithPruning$4(TreeNode.scala:642)
13.  at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:176)
14.  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUpWithPruning(TreeNode.scala:642)
15.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.org$apache$spark$sql$catalyst$plans$logical$AnalysisHelper$$super$transformUpWithPruning(LogicalPlan.scala:30)
16.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning(AnalysisHelper.scala:279)
17.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning$(AnalysisHelper.scala:275)
18.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
19.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
20.  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUpWithPruning$1(TreeNode.scala:635)
21.  at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren(TreeNode.scala:1228)
22.  at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren$(TreeNode.scala:1227)
23.  at org.apache.spark.sql.catalyst.plans.logical.OrderPreservingUnaryNode.mapChildren(LogicalPlan.scala:208)
24.  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUpWithPruning(TreeNode.scala:635)
25.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.org$apache$spark$sql$catalyst$plans$logical$AnalysisHelper$$super$transformUpWithPruning(LogicalPlan.scala:30)
26.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning(AnalysisHelper.scala:279)
27.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning$(AnalysisHelper.scala:275)
28.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
29.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
30.  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUpWithPruning$1(TreeNode.scala:635)
31.  at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren(TreeNode.scala:1228)
32.  at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren$(TreeNode.scala:1227)
33.  at org.apache.spark.sql.catalyst.plans.logical.OrderPreservingUnaryNode.mapChildren(LogicalPlan.scala:208)
34.  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUpWithPruning(TreeNode.scala:635)
35.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.org$apache$spark$sql$catalyst$plans$logical$AnalysisHelper$$super$transformUpWithPruning(LogicalPlan.scala:30)
36.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning(AnalysisHelper.scala:279)
37.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning$(AnalysisHelper.scala:275)
38.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
39.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
40.  at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUpWithPruning$1(TreeNode.scala:635)
41.  at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren(TreeNode.scala:1228)
42.  at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren$(TreeNode.scala:1227)
43.  at org.apache.spark.sql.catalyst.plans.logical.GlobalLimit.mapChildren(basicLogicalOperators.scala:1258)
44.  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUpWithPruning(TreeNode.scala:635)
45.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.org$apache$spark$sql$catalyst$plans$logical$AnalysisHelper$$super$transformUpWithPruning(LogicalPlan.scala:30)
46.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning(AnalysisHelper.scala:279)
47.  at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformUpWithPruning$(AnalysisHelper.scala:275)
48.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
49.  at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformUpWithPruning(LogicalPlan.scala:30)
50.  at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:611)
51.  at org.apache.spark.sql.ignite.IgniteOptimization$.pushDownOperators(IgniteOptimization.scala:63)
52.  at org.apache.spark.sql.ignite.IgniteOptimization$.apply(IgniteOptimization.scala:40)
53.  at org.apache.spark.sql.ignite.IgniteOptimization$.apply(IgniteOptimization.scala:33)
54.  at org.apache.spark.sql.catalyst.rules.RuleExecutor.$anonfun$execute$2(RuleExecutor.scala:211)
55.  at scala.collection.LinearSeqOptimized.foldLeft(LinearSeqOptimized.scala:126)
56.  at scala.collection.LinearSeqOptimized.foldLeft$(LinearSeqOptimized.scala:122)
57.  at scala.collection.immutable.List.foldLeft(List.scala:91)
58.  at org.apache.spark.sql.catalyst.rules.RuleExecutor.$anonfun$execute$1(RuleExecutor.scala:208)
59.  at org.apache.spark.sql.catalyst.rules.RuleExecutor.$anonfun$execute$1$adapted(RuleExecutor.scala:200)
60.  at scala.collection.immutable.List.foreach(List.scala:431)
61.  at org.apache.spark.sql.catalyst.rules.RuleExecutor.execute(RuleExecutor.scala:200)
62.  at org.apache.spark.sql.catalyst.rules.RuleExecutor.$anonfun$executeAndTrack$1(RuleExecutor.scala:179)
63.  at org.apache.spark.sql.catalyst.QueryPlanningTracker$.withTracker(QueryPlanningTracker.scala:88)
64.  at org.apache.spark.sql.catalyst.rules.RuleExecutor.executeAndTrack(RuleExecutor.scala:179)
65.  at org.apache.spark.sql.execution.QueryExecution.$anonfun$optimizedPlan$1(QueryExecution.scala:126)
66.  at org.apache.spark.sql.catalyst.QueryPlanningTracker.measurePhase(QueryPlanningTracker.scala:111)
67.  at org.apache.spark.sql.execution.QueryExecution.$anonfun$executePhase$2(QueryExecution.scala:185)
68.  at org.apache.spark.sql.execution.QueryExecution$.withInternalError(QueryExecution.scala:510)
69.  at org.apache.spark.sql.execution.QueryExecution.$anonfun$executePhase$1(QueryExecution.scala:185)
70.  at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:779)
71.  at org.apache.spark.sql.execution.QueryExecution.executePhase(QueryExecution.scala:184)
72.  at org.apache.spark.sql.execution.QueryExecution.optimizedPlan$lzycompute(QueryExecution.scala:122)
73.  at org.apache.spark.sql.execution.QueryExecution.optimizedPlan(QueryExecution.scala:118)
74.  at org.apache.spark.sql.execution.QueryExecution.assertOptimized(QueryExecution.scala:136)
75.  at org.apache.spark.sql.execution.QueryExecution.executedPlan$lzycompute(QueryExecution.scala:154)
76.  at org.apache.spark.sql.execution.QueryExecution.executedPlan(QueryExecution.scala:151)
77.  at org.apache.spark.sql.execution.QueryExecution.simpleString(QueryExecution.scala:204)
78.  at org.apache.spark.sql.execution.QueryExecution.org$apache$spark$sql$execution$QueryExecution$$explainString(QueryExecution.scala:249)
79.  at org.apache.spark.sql.execution.QueryExecution.explainString(QueryExecution.scala:218)
80.  at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$6(SQLExecution.scala:103)
81.  at org.apache.spark.sql.execution.SQLExecution$.withSQLConfPropagated(SQLExecution.scala:169)
82.  at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$1(SQLExecution.scala:95)
83.  at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:779)
84.  at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:64)
85.  at org.apache.spark.sql.Dataset.withAction(Dataset.scala:3856)
86.  at org.apache.spark.sql.Dataset.head(Dataset.scala:2863)
87.  at org.apache.spark.sql.Dataset.take(Dataset.scala:3084)
88.  at org.apache.spark.sql.Dataset.getRows(Dataset.scala:288)
89.  at org.apache.spark.sql.Dataset.showString(Dataset.scala:327)
90.  at jdk.internal.reflect.GeneratedMethodAccessor72.invoke(Unknown Source)
91.  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
92.  at java.base/java.lang.reflect.Method.invoke(Method.java:568)
93.  at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
94.  at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
95.  at py4j.Gateway.invoke(Gateway.java:282)
96.  at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
97.  at py4j.commands.CallCommand.execute(CallCommand.java:79)
98.  at py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
99.  at py4j.ClientServerConnection.run(ClientServerConnection.java:106)
100.  at java.base/java.lang.Thread.run(Thread.java:833)