geronimo-jpa_2.1_spec/src/main/java/javax/persistence/Persistence.java [228:254]:
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    private static PersistenceException createPersistenceException(String msg, Map<String, Throwable> failures) {
        String newline = System.getProperty("line.separator");
        StringWriter strWriter = new StringWriter();
        strWriter.append(msg);
        if (failures.size() <= 1) {
            // we caught an exception, so include it as the cause
            Throwable t = null;
            for (String providerName : failures.keySet()) {
                t = failures.get(providerName);
                strWriter.append(" from provider: ");
                strWriter.append(providerName);
                break;
            }
            return new PersistenceException(strWriter.toString(), t);
        } else {
            // we caught multiple exceptions, so format them into the message string and don't set a cause
            strWriter.append(" with the following failures:");
            strWriter.append(newline);
            for (String providerName : failures.keySet()) {
                strWriter.append(providerName);
                strWriter.append(" returned: ");
                failures.get(providerName).printStackTrace(new PrintWriter(strWriter));
            }
            strWriter.append(newline);
            return new PersistenceException(strWriter.toString());
        }
    }
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geronimo-jpa_2.0_spec/src/main/java/javax/persistence/Persistence.java [231:257]:
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    private static PersistenceException createPersistenceException(String msg, Map<String, Throwable> failures) {
        String newline = System.getProperty("line.separator");
        StringWriter strWriter = new StringWriter();
        strWriter.append(msg);
        if (failures.size() <= 1) {
            // we caught an exception, so include it as the cause
            Throwable t = null;
            for (String providerName : failures.keySet()) {
                t = failures.get(providerName);
                strWriter.append(" from provider: ");
                strWriter.append(providerName);
                break;
            }
            return new PersistenceException(strWriter.toString(), t);
        } else {
            // we caught multiple exceptions, so format them into the message string and don't set a cause
            strWriter.append(" with the following failures:");
            strWriter.append(newline);
            for (String providerName : failures.keySet()) {
                strWriter.append(providerName);
                strWriter.append(" returned: ");
                failures.get(providerName).printStackTrace(new PrintWriter(strWriter));
            }
            strWriter.append(newline);
            return new PersistenceException(strWriter.toString());
        }
    }
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geronimo-jpa_2.2_spec/src/main/java/javax/persistence/Persistence.java [153:179]:
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    private static PersistenceException createPersistenceException(String msg, Map<String, Throwable> failures) {
        String newline = System.getProperty("line.separator");
        StringWriter strWriter = new StringWriter();
        strWriter.append(msg);
        if (failures.size() <= 1) {
            // we caught an exception, so include it as the cause
            Throwable t = null;
            for (String providerName : failures.keySet()) {
                t = failures.get(providerName);
                strWriter.append(" from provider: ");
                strWriter.append(providerName);
                break;
            }
            return new PersistenceException(strWriter.toString(), t);
        } else {
            // we caught multiple exceptions, so format them into the message string and don't set a cause
            strWriter.append(" with the following failures:");
            strWriter.append(newline);
            for (String providerName : failures.keySet()) {
                strWriter.append(providerName);
                strWriter.append(" returned: ");
                failures.get(providerName).printStackTrace(new PrintWriter(strWriter));
            }
            strWriter.append(newline);
            return new PersistenceException(strWriter.toString());
        }
    }
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