Program: 34846
Project: 34846
Buggy source:
protected void connectionErrorOccurred(ConnectionEvent connectionEvent){
  final boolean isTracingEnabled=TraceComponent.isAnyTracingEnabled();
  if (poolState.get() == 50) {
    if (isTracingEnabled && tc.isDebugEnabled()) {
      Tr.debug(this,tc,"String_Node_Str" + this + "String_Node_Str"+ "String_Node_Str");
    }
    do_not_reuse_mcw=true;
  }
 else {
    try {
      if (!stale) {
        if (connectionEvent.getId() != com.ibm.websphere.j2c.ConnectionEvent.SINGLE_CONNECTION_ERROR_OCCURRED) {
          pm.fatalErrorNotification(_managedConnectionFactory,this,uowCoord);
        }
 else {
          this.markStale();
        }
      }
    }
 catch (    Exception e) {
      if (isTracingEnabled && tc.isDebugEnabled()) {
        String pmiName="String_Node_Str";
        if (cm != null) {
          pmiName=gConfigProps.cfName;
        }
        Tr.debug(this,tc,"String_Node_Str" + pmiName + "String_Node_Str",e);
      }
      com.ibm.ws.ffdc.FFDCFilter.processException(e,"String_Node_Str","String_Node_Str",this);
    }
    if ((this.getTranWrapperId() == MCWrapper.NOTXWRAPPER) || (this.getTranWrapperId() == MCWrapper.RRSLOCALTXWRAPPER) || (this.getTranWrapperId() == MCWrapper.NONE)|| (state != STATE_TRAN_WRAPPER_INUSE && state != STATE_INACTIVE)) {
      if (this.getTranWrapperId() == MCWrapper.NOTXWRAPPER || this.getTranWrapperId() == MCWrapper.RRSLOCALTXWRAPPER) {
        if (isTracingEnabled && tc.isDebugEnabled()) {
          Tr.debug(this,tc,"String_Node_Str" + getTranWrapperString());
        }
        this.transactionComplete();
      }
      this.clearHandleList();
      try {
        this.releaseToPoolManager();
      }
 catch (      Exception ex) {
        com.ibm.ws.ffdc.FFDCFilter.processException(ex,"String_Node_Str","String_Node_Str",this);
        if (isTracingEnabled && tc.isDebugEnabled()) {
          Tr.debug(this,tc,"String_Node_Str" + gConfigProps.cfName + "String_Node_Str",ex);
        }
      }
    }
 else {
      if (isTracingEnabled && tc.isDebugEnabled()) {
        Tr.debug(this,tc,"String_Node_Str");
      }
    }
  }
}

Fixed version (ground truth):
protected void connectionErrorOccurred(ConnectionEvent connectionEvent){
  final boolean isTracingEnabled=TraceComponent.isAnyTracingEnabled();
  if (poolState.get() == 50) {
    if (isTracingEnabled && tc.isDebugEnabled()) {
      Tr.debug(this,tc,"String_Node_Str" + this + "String_Node_Str"+ "String_Node_Str");
    }
    do_not_reuse_mcw=true;
  }
 else {
    try {
      if (!stale) {
        if (connectionEvent.getId() != com.ibm.websphere.j2c.ConnectionEvent.SINGLE_CONNECTION_ERROR_OCCURRED) {
          pm.fatalErrorNotification(_managedConnectionFactory,this,uowCoord);
        }
 else {
          this.markStale();
        }
      }
    }
 catch (    Exception e) {
      if (isTracingEnabled && tc.isDebugEnabled()) {
        String pmiName="String_Node_Str";
        if (cm != null) {
          pmiName=gConfigProps.cfName;
        }
        Tr.debug(this,tc,"String_Node_Str" + pmiName + "String_Node_Str",e);
      }
      com.ibm.ws.ffdc.FFDCFilter.processException(e,"String_Node_Str","String_Node_Str",this);
    }
    if ((this.getTranWrapperId() == MCWrapper.NOTXWRAPPER) || (this.getTranWrapperId() == MCWrapper.RRSLOCALTXWRAPPER) || (this.getTranWrapperId() == MCWrapper.NONE)|| (state != STATE_TRAN_WRAPPER_INUSE && state != STATE_INACTIVE)) {
      if (this.getTranWrapperId() == MCWrapper.NOTXWRAPPER || this.getTranWrapperId() == MCWrapper.RRSLOCALTXWRAPPER) {
        if (isTracingEnabled && tc.isDebugEnabled()) {
          Tr.debug(this,tc,"String_Node_Str" + getTranWrapperString());
        }
        this.transactionComplete();
      }
      this.clearHandleList();
      try {
        if (state != STATE_INACTIVE) {
          this.releaseToPoolManager();
        }
 else {
          if (isTracingEnabled && tc.isDebugEnabled()) {
            Tr.debug(tc,"String_Node_Str");
          }
        }
      }
 catch (      Exception ex) {
        com.ibm.ws.ffdc.FFDCFilter.processException(ex,"String_Node_Str","String_Node_Str",this);
        if (isTracingEnabled && tc.isDebugEnabled()) {
          Tr.debug(this,tc,"String_Node_Str" + gConfigProps.cfName + "String_Node_Str",ex);
        }
      }
    }
 else {
      if (isTracingEnabled && tc.isDebugEnabled()) {
        Tr.debug(this,tc,"String_Node_Str");
      }
    }
  }
}