[IMPALA-6995] False-positive DCHECK when converting whitespace-only strings to timestamp

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 3.0, Impala 2.12.0
• Fix Version/s: Impala 2.13.0, Impala 3.1.0
• Component/s: Backend
• Labels: crash
• Target Version: Impala 2.13.0, Impala 3.1.0
• Epic Color: ghx-label-9
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 08/May/18 21:33
• Updated: 18/May/18 05:11
• Resolved: 16/May/18 20:35

Description

select cast(' ' as timestamp);

F0508 14:32:07.245255 11824 timestamp-parse-util.cc:241] Check failed: dt_ctx->fmt_len > 0 (0 vs. 0) 
*** Check failure stack trace: ***
    @          0x428956d  google::LogMessage::Fail()
    @          0x428ae12  google::LogMessage::SendToLog()
    @          0x4288f47  google::LogMessage::Flush()
    @          0x428c50e  google::LogMessageFatal::~LogMessageFatal()
    @          0x1c3f485  impala::TimestampParser::ParseFormatTokensByStr()
    @          0x1c40553  impala::TimestampParser::Parse()
    @          0x1c4712a  impala::TimestampValue::Parse()
    @          0x2e5d8fa  impala::CastFunctions::CastToTimestampVal()
    @          0x2e45322  impala::ScalarFnCall::InterpretEval<>()
    @          0x2e27de5  impala::ScalarFnCall::GetTimestampVal()
    @          0x2de72de  impala::ScalarExprEvaluator::GetValue()
    @          0x2de6e69  impala::ScalarExprEvaluator::GetValue()
    @          0x1d1dbbf  Java_org_apache_impala_service_FeSupport_NativeEvalExprsWithoutRow
    @     0x7fb7cc1d07e8  (unknown)
Picked up JAVA_TOOL_OPTIONS: -agentlib:jdwp=transport=dt_socket,address=30000,server=y,suspend=n 
Wrote minidump to /home/tarmstrong/Impala/incubator-impala/logs/cluster/minidumps/impalad/42afc7f9-5b4a-4ed7-b34ad782-d7904747.dmp

It seems to work fine on a release build.

Issue Links

• is broken by: IMPALA-5315 Cast to timestamp fails for YYYY-M-D format