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UpgradeCheck Invalid response code 302 causing Mango to die at startup

  • Mango is suddenly crashing at startup, with the following log message:

    ERROR 2020-09-30T14:06:03,185 ( - Invalid response code 302, reason=Found:
    org.apache.http.HttpException: Invalid response code 302, reason=Found:
            at com.serotonin.web.http.HttpUtils4.getTextContent( ~[mango-3.6.6.jar:?]
            at com.serotonin.m2m2.web.dwr.ModulesDwr.getAvailableUpgrades( ~[mango-3.6.6.jar:?]
            at com.serotonin.m2m2.web.dwr.ModulesDwr.upgradesAvailable( ~[mango-3.6.6.jar:?]
            at ~[mango-3.6.6.jar:?]
            at com.serotonin.timer.Task.runTask( ~[mango-3.6.6.jar:?]
            at ~[mango-3.6.6.jar:?]
            at com.serotonin.timer.OrderedThreadPoolExecutor$ ~[mango-3.6.6.jar:?]
            at java.util.concurrent.ThreadPoolExecutor.runWorker( ~[?:1.8.0_131]
            at java.util.concurrent.ThreadPoolExecutor$ ~[?:1.8.0_131]
            at [?:1.8.0_131]

    This is running version 3.6.6 and was running fine on Monday. Is it that unhappy about a 302?

    Thanks in advance,


  • I purged the work directory, and the 302 error went away. Turns out the fact that it was the last message didn't connect it to the cause of the crash.

    I have sent the database and log files separately. Hopefully we can learn what's going on.