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Ferenc Gerlits updated MINIFICPP-2375: -------------------------------------- Description: When running ExecuteScript with {noformat} Properties: Script Engine: lua Script Body: print("hello world!") {noformat} onTrigger throws an exception, and the flow file gets penalized, although the script gets called: "hello world!" is printed to the console. The log file has {noformat} [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::core::Processor] [warning] Caught "attempt to call a nil value stack traceback:" (N3org6apache4nifi6minifi10extensions3lua18LuaScriptExceptionE) during Processor::onTrigger of processor: 2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5 (Execute script) (2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5) [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::core::ProcessSession] [warning] ProcessSession rollback for Execute script executed [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::SchedulingAgent] [warning] Caught Exception during SchedulingAgent::onTrigger of processor Execute script (uuid: 2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5), type: N3org6apache4nifi6minifi10extensions3lua18LuaScriptExceptionE, what: attempt to call a nil value stack traceback: {noformat} This is because the LuaScriptEngine requires the {{onTrigger}} function. The PythonScriptEngine also supports the use case of a simple script without an {{onTrigger}} function; in this case, no flow files can be processed or produced, but the processor can still be useful if Timer Driven or Cron Driven. I think the LuaScriptEngine should support this simple use case, as well. was: When running ExecuteScript with {noformat} Properties: Script Engine: lua Script Body: print("hello world!") {noformat} onTrigger throws an exception, and the flow file gets penalized, although the script gets called: "hello world!" is printed to the console. The log file has {noformat} [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::core::Processor] [warning] Caught "attempt to call a nil value stack traceback:" (N3org6apache4nifi6minifi10extensions3lua18LuaScriptExceptionE) during Processor::onTrigger of processor: 2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5 (Execute script) (2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5) [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::core::ProcessSession] [warning] ProcessSession rollback for Execute script executed [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::SchedulingAgent] [warning] Caught Exception during SchedulingAgent::onTrigger of processor Execute script (uuid: 2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5), type: N3org6apache4nifi6minifi10extensions3lua18LuaScriptExceptionE, what: attempt to call a nil value stack traceback: {noformat} > ExecuteScript with lua throws if there is no onTrigger function > --------------------------------------------------------------- > > Key: MINIFICPP-2375 > URL: https://issues.apache.org/jira/browse/MINIFICPP-2375 > Project: Apache NiFi MiNiFi C++ > Issue Type: Improvement > Reporter: Ferenc Gerlits > Priority: Minor > > When running ExecuteScript with > {noformat} > Properties: > Script Engine: lua > Script Body: print("hello world!") {noformat} > onTrigger throws an exception, and the flow file gets penalized, although the > script gets called: "hello world!" is printed to the console. The log file > has > {noformat} > [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::core::Processor] > [warning] Caught "attempt to call a nil value > stack traceback:" > (N3org6apache4nifi6minifi10extensions3lua18LuaScriptExceptionE) during > Processor::onTrigger of processor: 2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5 > (Execute script) (2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5) > [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::core::ProcessSession] > [warning] ProcessSession rollback for Execute script executed > [2024-05-15 15:11:29.108] [org::apache::nifi::minifi::SchedulingAgent] > [warning] Caught Exception during SchedulingAgent::onTrigger of processor > Execute script (uuid: 2cc9c0d6-6ea2-473e-a30d-5debb0b3b2c5), type: > N3org6apache4nifi6minifi10extensions3lua18LuaScriptExceptionE, what: attempt > to call a nil value > stack traceback: {noformat} > This is because the LuaScriptEngine requires the {{onTrigger}} function. The > PythonScriptEngine also supports the use case of a simple script without an > {{onTrigger}} function; in this case, no flow files can be processed or > produced, but the processor can still be useful if Timer Driven or Cron > Driven. I think the LuaScriptEngine should support this simple use case, as > well. -- This message was sent by Atlassian Jira (v8.20.10#820010)