[ https://issues.apache.org/jira/browse/IGNITE-11829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Diana Iakovleva reassigned IGNITE-11829: ---------------------------------------- Assignee: Diana Iakovleva > Distribute joins fail if number of tables > 7 > --------------------------------------------- > > Key: IGNITE-11829 > URL: https://issues.apache.org/jira/browse/IGNITE-11829 > Project: Ignite > Issue Type: Improvement > Components: sql > Affects Versions: 2.7 > Reporter: Stanislav Lukyanov > Assignee: Diana Iakovleva > Priority: Major > Labels: newbie > > Distributed joins fail with ArrayIndexOutOfBounds when the total number of > tables is > 7. > Example: > {code} > try (Ignite ignite = > Ignition.start("examples/config/example-ignite.xml");) { > IgniteCache cache = ignite.createCache("foo"); > cache.query(new SqlFieldsQuery("CREATE TABLE Person(ID INTEGER > PRIMARY KEY, NAME VARCHAR(100));")); > cache.query(new SqlFieldsQuery("INSERT INTO Person(ID, NAME) > VALUES (1, 'Ed'), (2, 'Ann'), (3, 'Emma');")); > cache.query(new SqlFieldsQuery("SELECT *\n" + > "FROM PERSON P1\n" + > "JOIN PERSON P2 ON P1.ID = P2.ID\n" + > "JOIN PERSON P3 ON P1.ID = P3.ID\n" + > "JOIN PERSON P4 ON P1.ID = P4.ID\n" + > "JOIN PERSON P5 ON P1.ID = P5.ID\n" + > "JOIN PERSON P6 ON P1.ID = P6.ID\n" + > "JOIN PERSON P7 ON P1.ID = P7.ID\n" + > "JOIN PERSON P8 ON P1.ID = > P8.ID").setDistributedJoins(true).setEnforceJoinOrder(false)); > } > {code} > throws > {code} > Exception in thread "main" javax.cache.CacheException: General error: > "java.lang.ArrayIndexOutOfBoundsException" [50000-197] > at > org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:832) > at > org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:765) > at > org.apache.ignite.internal.processors.cache.GatewayProtectedCacheProxy.query(GatewayProtectedCacheProxy.java:403) > at > org.apache.ignite.examples.ExampleNodeStartup.main(ExampleNodeStartup.java:60) > Caused by: class > org.apache.ignite.internal.processors.query.IgniteSQLException: General > error: "java.lang.ArrayIndexOutOfBoundsException" [50000-197] > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parseH2(QueryParser.java:454) > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parse0(QueryParser.java:156) > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parse(QueryParser.java:121) > at > org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.querySqlFields(IgniteH2Indexing.java:1191) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2261) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2257) > at > org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:53) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2767) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.lambda$querySqlFields$1(GridQueryProcessor.java:2277) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuerySafe(GridQueryProcessor.java:2297) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2250) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2177) > at > org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:817) > ... 3 more > Caused by: org.h2.jdbc.JdbcSQLException: General error: > "java.lang.ArrayIndexOutOfBoundsException" [50000-197] > at org.h2.message.DbException.getJdbcSQLException(DbException.java:357) > at org.h2.message.DbException.get(DbException.java:168) > at org.h2.message.DbException.convert(DbException.java:307) > at org.h2.message.DbException.toSQLException(DbException.java:280) > at org.h2.message.TraceObject.logAndConvert(TraceObject.java:357) > at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:308) > at > org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.prepare(GridSqlQuerySplitter.java:1770) > at > org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split0(GridSqlQuerySplitter.java:299) > at > org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split(GridSqlQuerySplitter.java:219) > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parseH2(QueryParser.java:415) > ... 15 more > Caused by: java.lang.ArrayIndexOutOfBoundsException > at java.lang.System.arraycopy(Native Method) > at > org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.childFilters(CollocationModel.java:240) > at > org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.buildCollocationModel(CollocationModel.java:733) > at > org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.distributedMultiplier(CollocationModel.java:667) > at > org.apache.ignite.internal.processors.query.h2.opt.GridH2IndexBase.getDistributedMultiplier(GridH2IndexBase.java:128) > at > org.apache.ignite.internal.processors.query.h2.opt.H2TableScanIndex.getCost(H2TableScanIndex.java:94) > at org.h2.table.Table.getBestPlanItem(Table.java:714) > at org.h2.table.TableFilter.getBestPlanItem(TableFilter.java:224) > at org.h2.table.Plan.calculateCost(Plan.java:121) > at > org.h2.command.dml.Optimizer.calculateBruteForceSome(Optimizer.java:137) > at org.h2.command.dml.Optimizer.calculateBestPlan(Optimizer.java:87) > at org.h2.command.dml.Optimizer.optimize(Optimizer.java:239) > at org.h2.command.dml.Select.preparePlan(Select.java:1018) > at org.h2.command.dml.Select.prepare(Select.java:884) > at org.h2.command.Parser.prepareCommand(Parser.java:283) > at org.h2.engine.Session.prepareLocal(Session.java:611) > at org.h2.engine.Session.prepareCommand(Session.java:549) > at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1247) > at > org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76) > at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:304) > ... 19 more > {code} > or if run with -ea > {code} > Exception in thread "main" java.lang.AssertionError > at > org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.childFilters(CollocationModel.java:237) > at > org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.buildCollocationModel(CollocationModel.java:733) > at > org.apache.ignite.internal.processors.query.h2.opt.join.CollocationModel.distributedMultiplier(CollocationModel.java:667) > at > org.apache.ignite.internal.processors.query.h2.opt.GridH2IndexBase.getDistributedMultiplier(GridH2IndexBase.java:128) > at > org.apache.ignite.internal.processors.query.h2.opt.H2TableScanIndex.getCost(H2TableScanIndex.java:94) > at org.h2.table.Table.getBestPlanItem(Table.java:714) > at org.h2.table.TableFilter.getBestPlanItem(TableFilter.java:224) > at org.h2.table.Plan.calculateCost(Plan.java:121) > at > org.h2.command.dml.Optimizer.calculateBruteForceSome(Optimizer.java:137) > at org.h2.command.dml.Optimizer.calculateBestPlan(Optimizer.java:87) > at org.h2.command.dml.Optimizer.optimize(Optimizer.java:239) > at org.h2.command.dml.Select.preparePlan(Select.java:1018) > at org.h2.command.dml.Select.prepare(Select.java:884) > at org.h2.command.Parser.prepareCommand(Parser.java:283) > at org.h2.engine.Session.prepareLocal(Session.java:611) > at org.h2.engine.Session.prepareCommand(Session.java:549) > at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1247) > at > org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76) > at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:304) > at > org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.prepare(GridSqlQuerySplitter.java:1770) > at > org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split0(GridSqlQuerySplitter.java:299) > at > org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split(GridSqlQuerySplitter.java:219) > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parseH2(QueryParser.java:415) > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parse0(QueryParser.java:156) > at > org.apache.ignite.internal.processors.query.h2.QueryParser.parse(QueryParser.java:121) > at > org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.querySqlFields(IgniteH2Indexing.java:1191) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2261) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2257) > at > org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:53) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2767) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.lambda$querySqlFields$1(GridQueryProcessor.java:2277) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuerySafe(GridQueryProcessor.java:2297) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2250) > at > org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2177) > at > org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:817) > at > org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:765) > at > org.apache.ignite.internal.processors.cache.GatewayProtectedCacheProxy.query(GatewayProtectedCacheProxy.java:403) > at > org.apache.ignite.examples.ExampleNodeStartup.main(ExampleNodeStartup.java:60) > {code} > The reason for 7 being the magic number seems to be H2's > Optimizer.MAX_BRUTE_FORCE_FILTERS = 7. When exceeding that, the behavior of > H2 code changes - to something Ignite doesn't expect. > Apparently enforceJoinOrder=true is a workaround - in that case Ignite > doesn't really try to compute the cost of the joins and doesn't execute the > buggy code path. -- This message was sent by Atlassian Jira (v8.3.2#803003)