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  1. Log4j 2
  2. LOG4J2-2592

StackOverflowException when server not reachable with SocketAppender

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 2.11.0, 2.11.2
    • 2.12.0
    • Appenders
    • None

    Description

      SocketAppender crashes log4j with StackOverflowException when the server where the log file should be sent is not accessible. It looks like toString() contains recursion.

      This also happens in 2.11.2 (even though log shows 2.11.0).

      This does not happen in 2.8.2 ( toString() methods were not there in that version)

       

      java.lang.StackOverflowError: null
      at java.lang.Integer.toUnsignedString0(Integer.java:344) ~[?:?]
      at java.lang.Integer.toHexString(Integer.java:262) ~[?:?]
      at java.lang.Object.toString(Object.java:246) ~[?:?]
      at java.util.concurrent.CountDownLatch.toString(CountDownLatch.java:314) ~[?:?]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at 
      
      ...
      1000s of same messages repeated in between 
      ...
      
      org.apache.logging.log4j.core.net.TcpSocketManager$Reconnector.toString(TcpSocketManager.java:358) ~[log4j-core-2.11.0.jar:2.11.0]
      at java.lang.String.valueOf(String.java:2951) ~[?:?]
      at java.lang.StringBuilder.append(StringBuilder.java:168) ~[?:?]
      at org.apache.logging.log4j.core.net.TcpSocketManager.toString(TcpSocketManager.java:495) ~[log4j-core-2.11.0.jar:2.11.0]
      

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            ggregory Gary D. Gregory
            davidkaya.ysoft Dávid Kaya
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              Updated:
              Resolved:

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