java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894)
	at java.util.HashMap$ValueIterator.next(HashMap.java:922)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.<init>(ArrayList.java:151)
	at org.slf4j.helpers.SubstituteLoggerFactory.getLoggers(SubstituteLoggerFactory.java:65)
	at org.slf4j.LoggerFactory.fixSubstituteLoggers(LoggerFactory.java:216)
	at org.slf4j.LoggerFactory.bind(LoggerFactory.java:154)
	at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:140)
	at org.slf4j.LoggerFactory.getProvider(LoggerFactory.java:411)
	at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:403)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:352)
	at org.slf4j.LoggerAccessingThread.run(LoggerAccessingThread.java:55)
Exception in thread "Thread-20" java.lang.IllegalStateException: Unexpected initialization failure
	at org.slf4j.LoggerFactory.bind(LoggerFactory.java:169)
	at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:140)
	at org.slf4j.LoggerFactory.getProvider(LoggerFactory.java:411)
	at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:403)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:352)
	at org.slf4j.LoggerAccessingThread.run(LoggerAccessingThread.java:55)
Caused by: java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894)
	at java.util.HashMap$ValueIterator.next(HashMap.java:922)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.<init>(ArrayList.java:151)
	at org.slf4j.helpers.SubstituteLoggerFactory.getLoggers(SubstituteLoggerFactory.java:65)
	at org.slf4j.LoggerFactory.fixSubstituteLoggers(LoggerFactory.java:216)
	at org.slf4j.LoggerFactory.bind(LoggerFactory.java:154)
	... 5 more