Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/483
@JPercivall @trixpan Great review process, I learned a lot from it, thank
you!
I pulled the latest PR and tested, Unit test passed, however, I got
following error if `Maximum number of SMTP connection` is 1. The error didn't
occur with allowing more than 2 SMTP connection.
It seems like the synchronized block and wait in
SMTPMessagingHandlerFactory.data() causing this.
```
2016-07-11 10:26:12,841 ERROR [Timer-Driven Process Thread-4]
o.a.nifi.processors.standard.PutEmail
PutEmail[id=837842bb-c28f-4866-919b-a9bb32003bdc] Failed to send email for
StandardFlowFileRecord[uuid=25082964-6b4e-43bf-b897-063521b70b90,claim=StandardContentClaim
[resourceClaim=StandardResourceClaim[id=1468200056438-1, container=default,
section=1], offset=500, length=10],offset=0,name=23170008565393,size=10]: Could
not connect to SMTP host: 127.0.0.1, port: 10024, response: 421; routing to
failure: javax.mail.MessagingException: Could not connect to SMTP host:
127.0.0.1, port: 10024, response: 421
2016-07-11 10:26:12,842 ERROR [Timer-Driven Process Thread-4]
o.a.nifi.processors.standard.PutEmail
javax.mail.MessagingException: Could not connect to SMTP host: 127.0.0.1,
port: 10024, response: 421
at
com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1949)
~[mail-1.4.7.jar:1.4.7]
at
com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
~[mail-1.4.7.jar:1.4.7]
at javax.mail.Service.connect(Service.java:295)
~[mail-1.4.7.jar:1.4.7]
at javax.mail.Service.connect(Service.java:176)
~[mail-1.4.7.jar:1.4.7]
at javax.mail.Service.connect(Service.java:125)
~[mail-1.4.7.jar:1.4.7]
at javax.mail.Transport.send0(Transport.java:194)
~[mail-1.4.7.jar:1.4.7]
at javax.mail.Transport.send(Transport.java:124)
~[mail-1.4.7.jar:1.4.7]
at
org.apache.nifi.processors.standard.PutEmail.send(PutEmail.java:462)
~[nifi-standard-processors-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
org.apache.nifi.processors.standard.PutEmail.onTrigger(PutEmail.java:341)
~[nifi-standard-processors-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
[nifi-api-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1077)
[nifi-framework-core-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:136)
[nifi-framework-core-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
[nifi-framework-core-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:123)
[nifi-framework-core-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[na:1.8.0_77]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
[na:1.8.0_77]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
[na:1.8.0_77]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
[na:1.8.0_77]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[na:1.8.0_77]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[na:1.8.0_77]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77]
```
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