Inconsistent synchronization around odbc sync handling ------------------------------------------------------ Key: TEIID-4466 URL: https://issues.jboss.org/browse/TEIID-4466 Project: Teiid Issue Type: Bug Components: ODBC Affects Versions: 7.7 Reporter: Steven Hawkins Assignee: Steven Hawkins Fix For: 9.1, 9.0.5, 8.12.x-6.4 There is a narrow race condition when an odbc message is followed by sync - the isExecuting check is supposed to prevent the sync until the execution is complete, but is not synchronized. The result can be an exception in the pg client: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.ArrayList.rangeCheck(ArrayList.java:653) at java.util.ArrayList.get(ArrayList.java:429) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1825) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255) As the pendingExecuteQueue will have been cleared by the early response to sync.